History YMMV / HarleyQuinn2019

* HePannedItNowHeSucks: Creator/ChristianFrates accused of the cartoon of copying ''Lobo''. Naturally, this didn't sit well with fans of ''Harley Quinn''.

* SeasonalRot: Season 4 is generally viewed as the weakest season of the show for a variety of reasons. Many were disappointed with how several changes made in Season 3 that were viewed as interesting by fans, such as Harley joining the Bat Family, Ivy becoming CEO of the Legion of Doom, and Joker becoming the Mayor of Gotham and genuinely doing good deeds, all get dropped with little fanfare as the season progresses. Not helping matters is how the other members of Harley's crew [[DemotedToExtra barely have any relevancy to the story]], as well as Nightwing suddenly being completely distrustful of Harley despite being willing to give her a chance by the end of the Season 3 finale. Add in [[TheyWastedAPerfectlyGoodPlot several storylines introduced in the season going nowhere]], such as Alfred being sent to Arkham or Bane's romantic interest in Nora, as well as an overall lack of focus with its main narrative, and it results in a season that's hard to swallow for many fans.

* MisaimedFandom: An episode in the second season [[TakeThat takes a swing at toxic fan culture]], with [[StrawFan one of two characters being represented by a shirt reading]] "[[Film/JusticeLeague2017 Release The]] [[Creator/ZackSnyder Snyder Cut]]". Actual fans hoping for a director's cut of that movie took that as a sign that Warner Bros. were actively interested in completing and distributing that version of the movie, rather than a clear sign of disinterest and mockery from the writers. [[HilariousInHindsight As it turns out, however,]] [[Film/ZackSnydersJusticeLeague a director's cut of]] ''[[Film/ZackSnydersJusticeLeague Justice League]]'' would indeed announced just a few weeks later for DC Universe's sister service Creator/HBOMax. Whether the ''Harley Quinn'' writers could possibly have been privy to that information is unknown. For what it's worth, [[ActuallyPrettyFunny many Snyder fans on social media took it in stride]] and Patrick Schumacker even praised them for the positive reception and expressed his own support for seeing the film.

** In season 2, Clayface mistakes Mr. Freeze for Music/LadyGaga. This becomes even funnier when Lady Gaga is cast as Harley in ''[[Film/{{Joker}} Joker 2]]''.

* LikeYouWouldReallyDoIt: [[spoiler:Ivy being "killed off" in the second-to-last episode. As if DC would kill off Poison Ivy, whose double-act with Harley Quinn is ''extremely'' popular. [[HeGotBetter She gets better]], obviously.]] [[spoiler: That being said, the show does still show some notable teeth for being willing to kill off other notable A-listers such as the Scarecrow, the Penguin, and Mister Freeze.]]

** When he loses a bet because of them, Bane threatens revenge on the Pittsburgh Steelers via blowing up their stadium. In ''Film/TheDarkKnightRises,'' the scene where [[SignatureScene Bane blows up a football field]] was filmed at the Steelers' real life home stadium.

** With ''WebAnimation/HazbinHotel'', of all things, mainly due to the [[BlackComedy similar brand of humor]] as well as ''Hazbin's'' creator, Creator/VivienneMedrano, being a vocal fan of ''Harley Quinn''.

** The show has been compared to ''WesternAnimation/TheVentureBrothers'', both shows taking a similar approach to portraying the high-octane world of superheroes and supervillains under a casual, [[{{Deconstruction}} Deconstructionist]] lens full of relationship drama and celebrity culture.

** '''''The Eat. Bang! Kill. Tour''''' spinoff comic includes cameos of Nightfall and other members from her old team, the Cadre. '''''The Real Sidekicks of New Gotham Special''''' comic includes White Rabbit, the [[Film/Joker2019 Joaquin Phoenix]] and [[Film/SuicideSquad Jared Leto]] versions of the Joker, and even [[Recap/TheNewBatmanAdventuresE8GrowingPains "Annie"]]!

* CrossesTheLineTwice: Given that the show is a BlackComedy starring an AxCrazy supervillain, it has the tendency to pole-vault over every single boundary that it comes off as RefugeInAudacity.

* CatharsisFactor: After watching The Joker constantly [[DomesticAbuse belittling and abusing]] Harley Quinn, killing Poison Ivy just to rob her of her best friend [[spoiler:although she was later revived]], and generally just being a huge {{Jerkass}} to everyone, it's extremely satisfying to see him [[AintTooProudToBeg pathetically beg for his life]] right before he's dropped into a vat of chemicals that completely erase his memory [[spoiler: even if it doesn't last]]. And even after [[spoiler: he reemerges as the Joker, he still gets a well-earned dope-slapping from Harley.]]

* SeasonalRot: Season 4 is generally viewed as the weakest season of the show for a variety of reasons. Many were disappointed with how several changes made in Season 3 that were viewed as interesting by fans, such as Harley joining the Bat Family, Ivy becoming CEO of the Legion of Doom, and Joker becoming the Mayor of Gotham and genuinely doing good deeds, all get dropped with little fanfare as the season progresses. Not helping matters is how the other members of Harley's crew [[DemotedToExtra barely have any relevancy to the story]], as well as Nightwing suddenly being completely distrustful of Harley despite being willing to give her a chance by the end of the Season 3 finale. Add in [[TheyWastedAPerfectlyGoodPlot several storylines introduced in the season going nowhere]], such as Alfred being sent to Arkham or Bane's romantic interest in Nora, as well as an overall lack of focus with its main narrative, and it results in a season that's hard to swallow for many fans.