History NiceJobBreakingItHero / MarvelCinematicUniverse

* The members of Avengers-199999 who visit L1130, along with the Avengers-L1130, indirectly give [[Characters/MCULokiVariantL1130 Loki (Variant L1130)]] a chance to escape from custody, setting into motion the events of Loki and the eventual death of Kang. This will cause one of his variants to replace him, who is a lot more villainous.

* The "time heist" the Avengers did in ''Film/AvengersEndgame'' very nearly gave Thanos everything he wanted. The Avengers travel back in time to recover the infinity stones from earlier in their timelines, in order to undo the snap. It all goes off without a hitch, until a past Thanos from 2014 (the year the events of ''Film/{{Guardians of the Galaxy|2014}}'' took place) discovers the time-traveling Avengers, and captures the present incarnation of Nebula, allowing him to travel back to the present, where the Avengers have ''already assembled an Infinity Gauntlet for him'' from Iron Man's armor, essentially stopping just short of gift-wrapping it. Even worse, when this Thanos learns to what lengths the Avengers have gone to in order to undo the snap, he realizes that leaving half of the universe alive was a mistake because the half that remained would always remember what they lost and resent Thanos for it. As a result, Thanos resolves to use the gauntlet to [[OhCrap destroy the]] [[FromBadToWorse ENTIRE universe]] [[KillEmAll this time]], and create a new one where [[AGodAmI everyone worships him]]. That's right, ''Endgame'' is the movie where the Avengers not only turn Thanos into an OmnicidalManiac, but also nearly give him all the tools he needs to put his beliefs into action![[note]]The present day Thanos, who the Avengers manage to slaughter at the start of ''Endgame'', already was one to some extent in ''Infinity War'', but this past Thanos had never gone through the development of the other one, making him less of a WellIntentionedExtremist in doing so.[[/note]]

* Odin's banishing of Comicbook/{{Thor}} helps show Comicbook/NickFury that the Earth is not ready to engage the galaxy, helping him become more paranoid, leading to many of Fury's experiments, including [[spoiler: the Phase II experiments to draw enough energy from the Tesseract to create weapons of mass destruction, which drew the attention of Thanos and Loki.]]

* The "time heist" the Avengers did in ''Film/AvengersEndgame'' very nearly gave Thanos everything he wanted. The Avengers travel back in time to recover the infinity stones from earlier in their timelines, in order to undo the snap. It all goes off without a hitch, until a past Thanos from 2014 (the year the events of ''Film/GuardiansOfTheGalaxy'' took place) discovers the time-traveling Avengers, and captures the present incarnation of Nebula, allowing him to travel back to the present, where the Avengers have ''already assembled an Infinity Gauntlet for him'' from Iron Man's armor, essentially stopping just short of gift-wrapping it. Even worse, when this Thanos learns to what lengths the Avengers have gone to in order to undo the snap, he realizes that leaving half of the universe alive was a mistake because the half that remained would always remember what they lost and resent Thanos for it. As a result, Thanos resolves to use the gauntlet to [[OhCrap destroy the]] [[FromBadToWorse ENTIRE universe]] [[KillEmAll this time]], and create a new one where [[AGodAmI everyone worships him]]. That's right, ''Endgame'' is the movie where the Avengers not only turn Thanos into an OmnicidalManiac, but also nearly give him all the tools he needs to put his beliefs into action![[note]]The present day Thanos, who the Avengers manage to slaughter at the start of ''Endgame'', already was one to some extent in ''Infinity War'', but this past Thanos had never gone through the development of the other one, making him less of a WellIntentionedExtremist in doing so.[[/note]]

* In ''Film/SpiderManNoWayHome'', going to Strange to undo [[spoiler: Mysterio]] exposing his identity in his previous film ''and'' getting cold feet right in the middle of the spell results in the dimensions imploding, which leads to numerous universes getting in a harmful collision and [[spoiler: villains like [[Film/SpiderManTrilogy Doctor Octopus, Green Goblin, Sandman]], [[Film/TheAmazingSpiderManSeries Lizard, and Electro]] terrorizing the Marvel Cinematic Universe. And Peter one-ups that by not letting Strange just return them to their home worlds - the ensuing fight ends up with Peter stranding Strange far away, and when the wizard returns, reality itself is breaking]]. Peter's screwup also directly leads to the events of ''Film/DoctorStrangeInTheMultiverseOfMadness''.

* Her lack of control over her powers in Civil War causes the last incident that help the Sokovia Accords get sanctioned. After Crossbones detonates a bomb in an area full of civilians (and strapped to himself), she, while trying to save the people near the explosion, accidentally throws the blast into a building full of people. While she saved the lives of Captain America and the other Avengers and law enforcement officers on the ground, she ended up inadvertently killing some Wakandan diplomats, helping cause the international strife that leads to the Accords.
* In grief of [[spoiler:losing Vision]], Wanda decides to [[spoiler:mind-wipe an innocent suburb into play-acting the fantasy of Vision being alive and having children so that she won't have to be alone.]]

* Her lack of control over her powers in Civil War causes the last incident that help the Sokovia Accords get sanctioned. After Crossbones detonates a bomb in an area full of civilians (and strapped to himself), she, while trying to save the people near the explosion, accidentally throws the blast into a building full of people, causing a lot more casualties than it initially would have (when Crossbones' only intended target was [[TakingYouWithMe Captain America]]).

*** However, Quentin's story [[UnreliableNarrator should be taken with a grain of salt]] for three reasons: 1) he works for Stark Industries, meaning that every project he works on is Stark Industries' property and, by extension, Tony's, 2) Tony himself admits that the name he gives to that project is a shitty one that had to be changed and 3) Quentin mentioned that everyone laughed at the name but, in truth, ''Film/CaptainAmericaCivilWar'' shows that the audience never actually laughed. [[spoiler:Quentin admits he was officially fired for being "unstable", which seems fairly accurate.]]

* In grief of [[spoiler:losing Vision]], Wanda decides to [[spoiler:mind-wipe an innocent suburb into play-acting the fantasy of Vision being alive and having children so that she won't have to be alone, which leads to multiversal consequences and Wanda being left alone anyways.]]

* In ''Film/SpiderManNoWayHome'', going to Strange to undo [[spoiler: Mysterio]] exposing his identity in his previous film ''and'' getting cold feet right in the middle of the spell results in the dimensions imploding, which leads to numerous universes getting in a harmful collision and [[spoiler: villains like [[Film/SpiderManTrilogy Doctor Octopus, Green Goblin, Sandman]], [[Film/TheAmazingSpiderManSeries Lizard and Electro]] terrorizing the Marvel Cinematic Universe. And Peter one-ups that by not letting Strange just return them to their home worlds - the ensuing fight ends up with Peter stranding Strange far away, and when the wizard returns, reality itself is breaking]].

* The season one finale of ''Series/Loki2021'' has her [[spoiler:killing He Who Remains. It's too bad that by doing that, it allows another variant of He Who Remains to become the new leader of the TVA, and allows all the Multiversal chaos that follows to occur.]]

* The season one finale of ''Series/Loki2021'' has her [[spoiler:killing He Who Remains. It's too bad that by doing that, it allows another variant of He Who Remains to become the new leader of the TVA, and causes Mobius as well as Hunter B-15 to go to back to being brainwashed with no memories of what happened within this show beforehand..]]

* The members of Avengers-199999 who visit L1130, along with the Avengers-L1130, indirectly give [[Characters/MCULokiVariantL1130 Loki (Variant L1130)]] a chance to escape from custody, setting into motion the events of Loki and the eventual death Kang. This will cause one of his variants to replace him.

*** However, Quentin's story [[UnreliableNarrator should be taken with a grain of salt]] for three reasons: 1) he works for Stark Industries, meaning that every project he works on is Stark Industries' property and, by extension, Tony's, 2) Tony himself admits that the name he gives to that project is a shitty one that had to be changed and 3) Quentin mentioned that everyone laughed at the name but, in truth, Film/CaptainAmericaCivilWar shows that the audience never actually laughed. [[spoiler:Quentin admits he was officially fired for being "unstable", which seems fairly accurate.]]

* In ''Film/SpiderManNoWayHome'', going to Strange to undo [[spoiler: Mysterio]] exposing his identity in his previous film ''and'' getting cold feet right in the middle of the spell results in the dimensions imploding, which leads to numerous universes getting in a harmful collision and [[spoiler: villains like [[Film/SpiderManTrilogy Doctor Octopus, Green Goblin, Sandman]], [[Film/TheAmazingSpiderManSeries Lizard and Electro]] terrorizing the Marvel Cinematic Universe]].

** In ''Film/SpiderManNoWayHome'', going to Strange to undo [[spoiler: Mysterio]] exposing his identity in his previous film ''and'' getting cold feet right in the middle of the spell results in the dimensions imploding, which leads to numerous universes getting in a harmful collision and [[spoiler: villains like [[Film/SpiderManTrilogy Doctor Octopus, Green Goblin, Sandman]], [[Film/TheAmazingSpiderManSeries Lizard and Electro]] terrorizing the Marvel Cinematic Universe]].

** Him forming the Avengers to fight for Earth, enables Earth to defend itself, but also makes it interesting to Comicbook/{{Thanos}}, a galactic conqueror.

* Steve Rogers' standing up for Comicbook/BuckyBarnes divided the Avengers worse than ever before, effectively making most of the team fugitives as well. His actions in Romania because of this likely killed or seriously injured several people and he nearly kills Tony in Siberia.

* The "time heist" the Avengers did in ''Film/AvengersEndgame'' very nearly gave Thanos everything he wanted. The Avengers travel back in time to recover the infinity stones from earlier in their timelines, in order to undo the snap. It all goes off without a hitch, until a past Thanos from 2014 (the year the events of ''Film/GuardiansOfTheGalaxy'' took place) discovers the time-traveling Avengers, and captures the present incarnation of Nebula, allowing him to travel back to the present, where the Avengers have ''already assembled an Infinity Gauntlet for him'' from Iron Man's armor, essentially stopping just short of gift-wrapping it. Even worse, when this Thanos learns to what lengths the Avengers have gone to in order to undo the snap, he realizes that leaving half of the universe alive was a mistake because the half that remained would always remember what they lost and resent Thanos for it. As a result, Thanos resolves to use the gauntlet to [[OhCrap destroy the]] [[FromBadToWorse ENTIRE universe]] [[KillEmAll this time]], and create a new one where [[AGodAmI everyone worships him]]. That's right, ''Endgame'' is the movie where the Avengers not only turn Thanos into an OmnicidalManiac, but also nearly give him all the tools he needs to put his beliefs into action![[note]]The present day Thanos, who the Avengers manage to slaughter at the start of ''Endgame'', already was one to some extent in ''Infinity War'', but this past Thanos had never gone through the development of the other one, making him less of a WellIntentionedExtremist in doing so.

[[/note]]

* It's the fault of the whole team, not just Cap, but the "time heist" in ''Film/AvengersEndgame'' very nearly gave Thanos everything he wanted. The Avengers travel back in time to recover the infinity stones from earlier in their timelines, in order to undo the snap. It all goes off without a hitch, until a past Thanos from 2014 (the year the events of ''Film/GuardiansOfTheGalaxy'' took place) discovers the time-traveling Avengers, and captures the present incarnation of Nebula, allowing him to travel back to the present, where the Avengers have ''already assembled an Infinity Gauntlet for him'' from Iron Man's armor, essentially stopping just short of gift-wrapping it. Even worse, when this Thanos learns to what lengths the Avengers have gone to in order to undo the snap, he realizes that leaving half of the universe alive was a mistake because the half that remained would always remember what they lost and resent Thanos for it. As a result, Thanos resolves to use the gauntlet to [[OhCrap destroy the]] [[FromBadToWorse ENTIRE universe]] [[KillEmAll this time]], and create a new one where [[AGodAmI everyone worships him]]. That's right, ''Endgame'' is the movie where the Avengers not only turn Thanos into an OmnicidalManiac, but also nearly give him all the tools he needs to put his beliefs into action![[note]]The present day Thanos, who the Avengers manage to slaughter at the start of ''Endgame'', already was one to some extent in ''Infinity War'', but this past Thanos had never gone through the development of the other one, making him less of a WellIntentionedExtremist in doing so.[[/note]]

* The season one finale of ''Series/Loki2021'' has her [[spoiler:killing He Who Remains. It's too bad that by doing that, it allows another variant of He Who Remains to become the new leader of the TVA, and causes Mobius to not recognize Loki.]]

* The season one finale of ''Series/Loki2021'' has her [[spoiler:killing He Who Remains. It's too bad that by doing that, it allows another variant of He Who Remains to become the new leader of the TVA, and causes Mobius to not recognize Loki.||

* ''Series/JessicaJones2015'':
** Jessica Jones tries very hard to ensure Kilgrave is arrested and tried to allow Hope to get exonerated. In doing so, due to Kilgrave's powers and connections, many people end up dead or their lives shattered, forcing her to have to let him get ahold of her so she can close enough to kill him herself. She does come out better for it, thanks to being exonerated in court by Jeri Hogarth, but had she killed him from the outset, she and Hope would have been in jail, but a lot of innocent lives would not have been taken in the process.

* Her lack of control over her powers in Civil War causes the last incident that help the Sokovia Accords get sanctioned. After Crossbones detonates a bomb in an area full of civilians, she, while trying to save the people near the explosion, accidentally throws the blast into a building full of people, causing a lot more casualties than it initially would have.

* Wanda gives Tony a nightmarish vision which scares him so badly that he rushes to create his Ultron project, allowing the Mind Stone to warp it.
* She then gives all of the Avengers (apart from Clint) nightmarish visions, including the Hulk, driving him into a rampage through Johannesburg.

*** However, Quentin's story [[UnreliableNarrator should be taken with a grain of salt]] for three reasons: 1) he works for Stark Industries, meaning that every project he works on is Stark Industries' property and, by extension, Tony's, 2) Tony himself admits that the name he gives to that project is a shitty one that had to be changed and 3) Quentin mentioned that everyone laughed at the name but, in truth, Film/CaptainAmericaCivilWar shows that the audience never make any laugh. [[spoiler:Quentin admits he was officially fired for being "unstable", which seems fairly accurate.]]

*** However, Quentin's story [[UnreliableNarrator should be taken with a grain of salt]] for three reasons: 1) he works for Stark Industries, meaning that every project he works on is Stark Industries' property and, by extension, Tony's, 2) Tony himself admits that the name he gives to that project is a shitty one that had to be changed and 3) Quentin mention that everyone laugh at the name but, in truth, Film/CaptainAmericaCivilWar shows that the audience never make any laugh. [[spoiler:Quentin admits he was officially fired for being "unstable", which seems fairly accurate.]]

*** However, Quentin's story [[UnreliableNarrator should be taken with a grain of salt]] for three reasons: 1) he works for Stark Industries, meaning that every project he works is Stark Industries' property and, by extension, Tony's, 2) Tony himself admits that the name he gives to that project is a shitty one that had to be changed and 3) Quentin mention that everyone laugh at the name but, in truth, Film/CaptainAmericaCivilWar shows that the audience never make any laugh. [[spoiler:Quentin admits he was officially fired for being "unstable", which seems fairly accurate.]]