The music
There's lots of reasons to hate this movie. Lousy CGI, appalling writing. But perhaps the most annoying aspect of this flick is the music. The never ending epic music, blasting away, throughout the entire picture. Men pack ice into dead fish with a score more over the top than the climactic reunification scene in a Disney movie about a pet dog finding it's way back to it's boy master.
Music can make or break a film. In this case it made a bad movie unbearable.