This is proof that an otherwise good movie can be hampered by not enough script re-writes (or maybe too many?). The dialogue is laughable and laudable.
The writer's style is such that the lines are delivered in a very staccato style: A quips to B, B responds with quip to A. There are no real "conversations" in the movie, and it makes it had to develop any of the back-story of the characters. "Quips" about someone's past are usually quickly dismissed into the script, never to be seen again.
Some of the movie made me laugh, it was so poorly written. In a scene where a death occurs, there was no emotional outburst from their family member. It was crazy, and felt very rushed, like the director or writer was trying to push us forward quickly to the next scene, without slowing the camera down and exploring the actor's emotions.
Badly written. C-