I understand why people are angry after watching the movie. Some say it's "pointless", but that is not lazy writing which makes it so, on the countrary. I think the idea of this movie is to show how crazy anger can be and how pointless the deaths can be, yet they still happen. I think the ending, which doesn't explain much, actually adds up to this point. Yet still, I felt unsettled by the ending, cause I really wanted some closure.