For too long, mental health has been a crutch for lazy writers to create villains, not realizing that they've created villains out of the audience, and through that, themselves.
The Uncomfortable Truth About “Joker”
No Laughing Matter: Ranking the Jokers
Ryan saw the new Joker movie and wondered where Joaquin Phoenix's performance ranked among the all-time great Joker performances... so he wrote them down.
Narcissistic Penguin 