I saw the last 30 minutes or so, where the main focus was on the one guy who refered to himself as "a mushroom".
In my opinion, it seemed to me that they forgot to build him up after they broke him down.
He seemed to belive he was little more than a pylon, who did chores when he told. He had no understanding of his role as a representative of his country, or even why his country was fighting a war.
He was fighting depression and alcoholism (developed while serving) and had some suicidal tendancies. He claimed that after reaching out for support from within the military that he found he could not get sufficient help for these inflictions.
I felt it was sad.
I was also extremely put off by he and his buddies lashing each other with that cord hard enough to leave huge welts, and as one mentioned scarring.
Feats of strength and feats endurance have a place in the military amoung soldiers, but that was self destuctive behavior at its finest. Getting drunk and mutilating yourself seems like a cry for help more than a good way to blow off steam.
Anyway, we have to keep in mind that the US army is vast and the documentary only reflects the tiniest fragment of their service personel.
While its very sad to me what that guy was going though, I don‘t believe that he represents the majority of American soldiers.
Hopefully though, if there is a lack of support for people in his position within the Armed Forces in the USA, then maybe the film will draw some attention to the problem, and they can begin to make the appropriate changes.