Lack of good storyline.

Tells a fascinating and unsettling true story, and does so well, without pretending to have all the answers.

A lot of perfectly good film show their cards early, establish a unique premise and let the audience explore a topic at a leisurely pace, without much in terms of surprise. this film is not one of those films.

There is definitely an excellent idea hidden in the background of the film. Unfortunately, it's difficult to find it.