Lack of good storyline.

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

It is an exhilarating, distressing, funny and profound film, with one of the more memorable film scores in years,

The plot isn't so bad, but the pace of storytelling is too slow which makes people bored. Certain moments are so obvious and unnecessary for the main plot. I would've fast-forwarded those moments if it was an online streaming. The ending looks like implying a sequel, not sure if this movie will get one