Don't even try to take this film seriously, because it's obviously made for laughs. I saw it with some friends on a "b-movie night" and we laughed our asses off! The overly plastic animation of the shark, how it attacks and the clichés of the main characters almost getting it on with each other on screen, the bad acting (seriously, these "actors" are even worse than you in drama class), the way how the shark overcomes the attacks, etc etc.
Even the camera work could've been better, but this film is just another stick of hay on the postmodern pile where I'm looking for needles that don't have "property of Christopher Nolan" laser printed on them (although he barely touches Kubrick's genius, but that's another topic).
If you're a critic you will hate it, if you wanna see a movie for super laughs, get super shark.