But I did watch it with an open mind, that wasn't the problem. In fact, I enjoyed the beginning quite a lot (the scene where he takes control of the Smurf for the first time is awesome), but it all went downhill rather quickly after that.
Plus, a movie that takes itself so seriously should at least try to get the basics right: character development was sketchy at best, dialogues were painfully bad, ...
And, probably unlike most people, I wasn't blown away by the special effects either.