But Marvel has made bad films, are you forgetting Iron Man 2 and the Thor films?
The first Thor movie was actually good.
I would consider Iron Man 3 to be Marvel's first failure. And I know a lot of people disliked Iron Man 2. But I believe Ant-Man will be a lot better than Iron Man 3 so I don't think we should consider it a failure so soon. I like heist movies but I agree it does look pretty generic. And its unfortunate Hank Pym has now been I guess downgraded but Im really hoping they give him a good origin that connects him to the other Avengers.
I don't see how IM3 can be considered a failure considering it was critically and financially the best CBM to come out in 2013.