Easy.. that there was effectively no character work in this film. At all. It's entirely plot and powers driven, no twists, no turns, almost entirely predictable throughout. It's full of sound and fury, signifying nothing, a script not much better than a sorta-decent fanfic. If this story had been told in a 2, 4 part comic book, nobody would think twice about it afterward. A feature film deserves a much, much better script than this one got.
My nickel's worth. I only just saw the film recently after having passed on it for a long period.