Nope, go back and check out the early reactions to the promo material. Leto's Joker was front and center of the trailers which made it seem as if he was going to be the villain of the film. People were generally looking forward to it, and were willing to give it a shot. Praise might be a strong word, I agree, but he wasn't universally despised beforehand and the majority were not against him. Leto's Joker became hated AFTER the film was released, and I think it had more to do with the fact that he was barely in the movie. Then people started to look at everything that was wrong with the character. And then we got Phoenix's Joker, and now the hate for Letos' Joker is at its strongest yet.