I can see how this plays into incel fantasies and the movie sort of roots for the Joker here as it’s entirely from his POV. I wouldn’t want to see this with an audience who cheers the kills. In this Origin Story he’s delusional and full of self pity, a bad childhood got him where he is, which is utterly trite. He’s just another fuck up out for personal revenge. In The Dark Knight The Joker took the piss out of that sort of reductive cliche, by giving backstories like this only for it to turn out to be another "joke". Heath Ledgers Joker is political, with a philosophy and a plan, which is so much more interesting.