Joker (2019 Film) - feels good

He got what he fucking deserved.

That's perfectly fine.
It may have been one of the very few movies to come out last year that were anything better than below average, but that doesn't mean it was something EVERYBODY would like.
In fact, that's how movies (and any media) should be, deciding on the particular audience (or audiences) they want to appeal to and making sure it appeals to them, even if some people don't really care for it.
After all, trying to please everybody usually just results in a mediocre product that pleases nobody.