I took all this as the great de-humanizing effect that basic training has on the malleable mind.
The problem is, it's structured to play a little bit like all of those and maybe it's supposed to be. But in any case, the resolution doesn't make sense. If he was just a giant f*** up the entire time, well, then s***, yeah he'd be miserable and off himself under the pressure. Or if he were full of bad wiring, I'da thought you'd've seen that from the beginning. But as the segment goes on, he improves. He gets to be better physically. He becomes a better soldier. He begins to find his place as a soldier. And one would think that the pressures he was under at the beginning were relieved.
But instead, when the pressure is off, that's when it goes to s***. I can't find a particularly good explanation for that. If it's just supposed to be a tragic thing, then what the hell was all that build up for? It was just a cop out, storywise. If it was to show how brutal training could be, then give me someone strong who's broken down. Or at least someone with a fully developed brain. Even if it is gonna get splattered on a bathroom wall.