He looks good to me! Joaquin Phoenix is a fantastic actor. This movie takes place before he's the Joker so I believe the way he looks now won't be his final form of the Joker.
I want to know why some people say this looks terrible. What makes it look terrible?
Maybe many thinks the makeup looks amateurish? I think that's kinda the point. Hes just a maniac who paints his face.