The problem with people watching a brand like Marvel, is they go in with grand expectations of what it should be.
This isnt a typical beat up the bad guy movie. This one revolves around the internal struggles we all face, wether we admit it or not.
Granted, those who decide what goes into a trailor do a terrible job of selling the movie leading audiences going in with a preset idea. They either dont give you enough in the preview or give away too much (I.E. red hulk being the president) in the trailor.
This was a good movie.