My animation teacher last semester was a stroyboard artist on that. We had a long discussion on what happened, and according to her most of her fellow coworkers shared your lament.

Oh and I forgot to mention, they locked the director out of the editing process. THE FUCKING DIRECTOR HAD NO CONTROL OVER THE MOVIE SAVE FOR A COUPLE SCENES. That's like hiring someone to conduct and orchestra and then letting four old dudes do it instead, but when it sounds like shit, blame the guy you hired.

The problem with the movie was this; Fox would not stop fucking with it. They fired multiple SFX people during FILMING, went back and shot more scenes after filming officially closed, which is why Sue's hair looks fake as fuck in some scenes, they would not let the director just fucking direct the goddamn movie and a multitude of other reasons. Fox needs to stop with the superhero movies and just let Xmen carry their asses and not fuck with that franchise more than they already have. Fox is notorious for ruining movies because they're like "nah see, I want more glow sticks and shiny stuff in it...make stuff more shiny!" "But sir it's a movie about the struggle of jews in nazi germany."