Did Bale waste his time on the Batman movies?
It's not one of his liked roles at all despised the critical acclaim of the Nolan films. Some would argue they're his worst performances. He was decent in Begins but something went seriously wrong with the sequel performances. I don't know if he and Nolan and the writers had major disagreements over how Batman should be portrayed or something...
Bale is only a good Batman to some people by association with Nolan than anything else. He's usually a really good actor but I think Batman will be his biggest regret. He completely missed the mark in the sequels when he should've been on his A game. I think he's the reason why the The Dark Knight in particular wasn't nominated for Best Picture.
Michael Keaton has a lot of goodwill as Batman even though he's not quite as good an actor as Bale overall. I think it looked even worse on Bale when editorials came out declaring Ben Affleck as a better live action Batman even though Affleck had the disadvantage of being in one of the worst movies of the year. That is seriously damning.