I totally respect your take but I have to ask:
The message? What message did you take away from it?
What I saw is a drama about mental illness in a broken system/society and how that can create a monster.
There was no glorification of the violence or his sickness.
I thought it was very sad, very creepy and I thought a realistic look at a villain was refreshing.
The really scary villains in our world (like Hitler) are created when violent delusional psychopaths are celebrated by the angry masses, but I don't think there is just one message or one that is that direct.
If anything, this movie is about a simple question - if the Joker lived in the real world, what circumstances might it take to create someone like that?
I thought is was very well written, directed and acted.
Not everyone likes depressing psychological dramas and people who dont like that sort of film normally wont like one about a classic comics character - that might not be true for everyone who didn't like it but for a lot I think it is.
Also- I just like to debate and discuss movies. Don't mind me