a problem I had with this movie was the idea that the joker gets his strength from his own "victimhood".
the more he is portrayed as a victim in this film, the more support he gets from the community.
this support from the community, empowers him to become The Joker.
there's a great scene in ST:TNG where Picard is captured by the Cardasians ("I. See. Four. Lights!")
at one point, after torturing Picard by every means possible, the Cardasian Warlord feeds Picard an "egg",
as he tells Jean Luc a story: this fearsome warrior was once a young child, who had been bullied by older boys.
these bullies end up stealing his food (an egg) and leaving him to go hungry in the streets.
Picard laughs at him. 'from now on I will NOT see a fearsome warrior, I will only see a six year old boy'
and even as the cardasian steps up the torture, as Picard is writhing in pain from the torture device,
Picard says: "you are six years old and helpless, you cannot hurt me!" -- this infuriates the villain.
--> I can't help thinking, that from now on, when I look at the Joker,
I will NOT see a diabolical criminal mastermind who is capable of taking on The Batman;
instead I will see a helpless victim.