Joker: Folie à Deux is a great dose of fictional realism, which I really appreciate in a world of childish comic book movies.
No, you should not want to be the Joker.
No, being an incel is not rewarding or redeeming.
In fact, watching the Joker mature and come to terms with himself was a great expose of the clear-eyed qualities of despair.
Despair is, in fact, okay. It is, at its best, the happy acceptance of hopelessness.