The movie was so frustrating, the writer really messed it up.
The plot is all about depression and a dysfunctional family.
The father is a wreck, still traumatized by his own dad, while the mother is portrayed as a cheater who only thinks about having an affair. The older brother is constantly horny, chasing after his girlfriend, and then to top it off, he stupidly ends up shooting his own father in the end.
The saddest part is the youngest child, caught in the middle of these three terrible characters.