In "The Gamer," Marinette is seemingly at fault for beating Max in a Curb-Stomp Battle to take his spot at a gaming tournament (see Broken Base below). Many characters acknowledge she's the best gamer in the school, however, and in the end Adrien gives up his spot so that she can Max can compete together as a team.
An anime OVA for Miraculous Ladybug is in the works, which might satisfy the 2D fans.
Come "Antibug," Chloe Took a Level in Kindness on Ladybug's advice and starts to warm up to Sabrina, whom she cruelly treated earlier. She is still a bitch to everyone else.
Base Breaker: Lila/Volpina is quickly becoming this. Part of the fan base hates her for her deception and lies, along with rejecting Marinette's apology about her humiliating her, but others think she's a realistic, refreshing character who will soften up a bit and get more development in the next season. A lot of this is due to Hype Backlash, as the character's design had been released months ahead of her first appearance and became a popular piece of Fanfic Fuel. Many fans made up Fanon personalities and theories about her and got angry when none of them were close to the truth.
Broken Base: The hop from 2D to CGI. While some are welcome to the change in art style and are impressed by the visuals, some others would have liked to see the Animesque, Pretty Cure-styled visuals seen in the original PV.
On a related note, there are those that are annoyed at how the show was changed from a darker superhero series meant for teens and young adults into a Lighter and Softer show geared towards younger audiences, while others argue that this change will help it gain a wider audience, since networks were not interested in the series until it was toned down.
Cat Noir's early 2D incarnation, Felix, is between Base Breaker and Flame Bait status. Even though the show creators say he had limited story potential, his design implied enough maturity and interesting darkness to make some fans rant about him being better than Adrien.
At the same time, many fans of the current show argue that Felix is a cliché "bad boy" type and would make a terrible role model that encouraging girls to pursue jerks with the idea "I can change him" while Adrien is a better character that gives a legitimate reason for Marinette to love other than "he's hot".
"The Gamer". As the debate goes, either Marinette is more selfish than Max in wanting to take his coveted spot in a gaming tournament, or she has the right to take that spot because Max lost in fair combat twice and thus was not the school's best gamer.
Designated Villain: Rogercop. Up until he seized control of Paris from the mayor, the worst of his crimes was excessive force; he only attacked people that had been proven to have committed wrongdoing, such as the litterer, the mayor for abusing his powers, and Ladybug and Cat Noir for preventing an officer from making an arrest, i.e. knowingly aiding a criminal. But he is still under Hawk Moths control who orders him to take Ladybugs and Cat Noir's miraculous's.
Die for Our Ship: Chloe and Lila get hit by this hard for their crushes on Adrien. In a bit of a Double Standard, guys who crush on Marinette/Ladybug like Nathanael and Theo escape this entirely, with some fans even rooting for Lila to fall for Marinette only to hate her when she went after Adrien instead. Justified for the two boys escaping this as their attraction showed up in only one episode each and was never referenced again (not even Nathanael's despite being in the same class as them), while Chloe makes moves on Adrien in nearly every episode and Lila will apparently be a recurring character liable to do the same. However, Chloe's case is at least somewhat understandable, given her general Hate Sink-ness.
The song from the trailer, sung by Noam Kaniel, the same person as the theme to Code Lyoko. The lyrics are Adrien (then Felix) trying to cheer Marinette up when "Every love went through your head/ Giving love turned bad".
The Mime was well-liked in the preview. He is also Thomas Astruc's favoritevillain.
Nathanael, one of Marinette's classmates, seems to be quite popular despite being a background character with barely a couple minutes of screentime. Then, in "Evillustrator," he was revealed to have a one-sided crush on Marinette, and served as the Villain of the Week - with a particularly ingenious skillset. His popularity has increased dramatically.
Epileptic Trees: Due to the fact that this is 3D CGI show, there are several times where the same item model is used for different situations, leading to many theories over whether or not the repeated use of the model was intentional or just for budgeting purposes.
Family-Unfriendly Aesop: Courtesy of "Antibug": even if the local Alpha Bitch is a Consummate Liar and won't admit that her selfish actions caused several people to become akumas, one should acknowledge the only time that she makes a good point since good advice can come from unlikely places.
Sabrina. Yes, she's allied with Chloe and occasionally is as much of a jerk as she is, but she also has no idea what real friendship is, and gets easily crushed. Her father gets fired in one episode and turned into an akuma, forgetting who she is, and she can't understand that Marinette needing to handle a personal thing the day before a project is due is not the same as Chloe refusing to do schoolwork. Heck, when she gets turned into an akuma she doesn't even get a cool Evil Costume Switch! She's just invisible, and her outline shows that her outfit hasn't changed.
XY, the young and upcoming pop star in "Guitar Villain". He makes catty remarks about Jagged Stone being a dinosaur, but Guitar Villain trying to kill him for those remarks is Disproportionate Retribution. He also doesn't seem to be much older than Marinette, which could be attributed to him being a Spoiled Brat.
Les Yay: One of Chloe's favorite games is to dress up as Ladybug and have Sabrina dress up as Cat Noir. Note that Cat Noir is a guy who constantly flirts with Ladybug.
"Feed Adrien!" or "Let Adrien eat!" note In episode 15, Adrien was really eager to eat Marinette parents' food, but kept having them taken away from him before he even managed to touch them; cue the fandom wanting to feed the poor kitty.
Marinette's phone kleptomania. note She's stolen three people's phones in the series (Adrien's in "Copycat", Alya's in "The Mime", and Chloe's in "Reflekta"), but the fandom portrays her as a compulsive phone stealer. Ironically, she actually sacrifices her own phone twice, in "Horrificator" and "Antibug".
"Eren, what are you doing in that cat costume?" note Adrien is voiced by Bryce Pappenbrooke in the English dub who also happens to be the voice of Eren Jaeger from Attack on Titan. Due to Pappenbrooke using the exact same voice for both characters, multiple jokes such as the former have spawned.
Misaimed Fandom: A lot of fans are very supportive of Ladybug's decision to confront Lila and humiliate her in front of Adrien for lying. The episode makes it very clear Ladybug was in the wrong as she gets called out by Adrien and apologizes to Lila about it later.
Mis-blamed: Some fans complain that the dubbers of the English version ruined the dialogue by putting in ridiculous words and phrases, especially "evilize." However, it was the show's writers at ZAG, not English dubbers, who wrote the English version, which the animation of the show was built around. Thomas Astruc even admitted that "evilize" was his idea.
Moral Event Horizon: Hawkmoth's choice of victim in "La Marionettiste" Manon, a young child led some fans to believe that he crossed it.
In "Lady Wifi", Marinette recognizes that Alya is the Villain of the Week by the charm on her cell phone. It may not seem narm-y, until you see that aside from her outfit and mask, she looks exactly the same as she always does. It becomes even more so in "Robocop" when Sabrina is able to immediately recognize that the Robocop is her dad even though his face and outfit is obscured.
Some of the villains can qualify, regardless of if they turn out to be Not-So-Harmless Villains. For example: The Bubbler and Mr. Pigeon — it's kind of hard to buy bubbles and pigeons as real citywide threats (which really isn't helped by both men's rather embarrassing-sounding monikers, The Bubbler's attempts to be Totally Radical, and Mr. Pigeon actually threatening the heroes with death by pigeon poop).
A few have started calling the ship Chatbug or — more straightforwardly — Catbug.
Thanks to the Two Person Love Square, we have four different ship names just for the two main characters; LadyNoir is a popular term for the pairing in the fandom for Ladybug/Cat Noir, Ladrien for Ladybug/Adrien, MariChat for Marinette/Cat Noir, and Adrienette for Adrien/Marinette.
Considering that Evillustrator indulged in Poke the Poodle moments before it seemed that Marinette betrayed him, and he only wanted to take her out for a romantic cruise on the Seine and on his birthday, it is really hard to sympathize with Marinette and Cat Noir's well-intentioned attempt to disarm him.
Few, if any, viewers find themselves eager for Ladybug and Cat to hurry and stop Rogercop before he can get to the Mayor. Even more so when Rogercop simply forces the jerk to resign on live television instead of outright murdering him or anything.
The Scrappy: Chloe's father, the mayor of Paris. He spoils his daughter rotten, doesn't acknowledge that she causes a lot of trouble, and is as helpless as any authority figure to handle akuma. On top of that, he very blatantly abuses his position to order people around, making it very clear where Chloe gets it from.
Ship Mates: In a non-romantic example, Alix and Nathanaël are this to all of the platonic relationships in the cast. They are the only two in their class without official best friends, so fans like to make them close so that nobody in the class is alone.
Special Effects Failure: The series was animated to English scratch voice dialogue. Being redubbed with the official English cast led to some lines being just a hair out of time, all the more noticeable with the very well-pronounced mouth animation.
In "The Pharaoh" the professor is right to point out Don't Touch It, You Idiot! about the Staff of Anubis because ancient artifacts are delicate and can easily become damaged.
In "Lady WiFi" the principal has no choice but to suspend Alya for photographing the inside of Chloe's locker because it is a violation of privacy and photographs like that could lead to cyberbullying. Alya feels wronged, but she overstepped her bounds as an Intrepid Reporter and a classmate.
Ladybug not taking Chloe's advice in "The Antibug." As she points out to Cat Noir, Chloe had lied to them earlier about her fight with Sabrina and was otherwise useless in battle as The Millstone and a bystander. She had no reason to trust Chloe's word.
Marinette in "Guitar Villain" when producer Mr. Ross wants her to design Jagged Stone's album cover to mimic that of XY's. Although Tikki tells her to stick to her guns and design it the way she would, Marinette has a good point in saying that Mr. Ross told her to design it a certain way; most graphic designers have to compromise their styles to satisfy clients. Marinette was just really lucky that Jagged had enough power as a musician to override what Mr. Ross wanted and tell Marinette to design it in her style.
This Is Your Premise on Drugs: The show is basically a Magical Girl show on crack, due to its frenetic pacing. That's not necessarily a bad thing, especially since this fast pace trims the transformation sequences to only fifteen seconds.
Papillon/Hawk Moth, due to his extremely tight face mask, thin face shape and huge eyes making him look decidedly... off.
Rose falls into this sometimes due to her enormous eyes, which are overly large even compared to the already large eyes of the rest of the cast.
Chloe can also be this since her some of her expressions, specifically the ones where she narrows her eyes, unintentionally make her skin look really tight and plastic-y.
Unintentionally Sympathetic: XY in "Guitar Villain". Jagged and Marinette dislike him for being "young" and considered a better musician, having overtaken Jagged on the music charts, and XY makes some catty remarks about Jagged Stone being a dinosaur. With that said, his fear when Guitar Villain kidnaps him and makes him Walk the Plank at the Eiffel Tower makes him endearing; he is also very childlike in his maturity and has a human reaction to Jagged after Ladybug purifies the latter.
Visual Effects of Awesome: As noted on the main page, the CG version of Miraculous Ladybug was produced for $11.5M, more than most Western productions. This has blessed the show with highly-detailed visual design, dynamic battle choreography, expressive animation and particle effects.
Adrien, who is a Stepford Smiler about his home life, does a suffocating modeling job to make his dad happy but leaves no time for him to hang out with his friends, and crushes on a Magical Girl whom he thinks is better than he is and rebuffs his romantic gestures. Heck, in his birthday episode only one person remembered to give him a present and his best friend got turned into an akuma on his behalf. He says he only feels like himself when he is Cat Noir in the webisode about his "Double Life".
Master Cheng, Marinette's uncle. He doesn't speak French well, gets his prize-winning soup sabotaged by a bratty teenager, and then gets turned into an akuma. At least the other characters could speak French and knew about Ladybug, but he looks traumatized when he wakes up next to the pool and doesn't know what happened.
Marinette herself, especially in The Birth of Ladybug Part 1, where she's a completely different person prior to becoming Ladybug. Her lack of self-confidence, uncertainty and self-esteem issues are poignant due to believing she's a klutz who can't do anything right, not helped by Chloe's bullying her for 4 years prior to the story and that's before Adrien came in. She's even a doormat to her bullying, whereas in the present, she does stand up for herself. When she fails to purify the Akuma on her first job as Ladybug, she feels like she has completely failed that she almost gave up being Ladybug from there. While she does gets better in the present day, there are hints that being Ladybug hasn't completely solved the issue, which show up from time to time.
Nooroo, Hawkmoth's kwami. He, like all kwamis, wants to use his powers to help people, but Hawkmoth basically enslaved him and forces him to do evil.