I'm talking about games that you still like but you had no idea were criticized so much.

The perfect example for me is Sonic Unleashed.

I admit that the game has its bad things, but I would have never imagined that it was so hated at the time... Although, that could be extended to the entire Sonic franchise, since for many years I was not aware at all of that "Sonic was never good", "Sonic had a rough transition to 3D" nonsense.