Overall, I can definitely feel the emotion in this piece, and that's a good thing. I like the PoI files, as they provide decent framing for the rest of the piece. I'm gonna echo Petrograd a bit, I do feel that the plaques detract from the piece. As this is set up as an art gallery, I think they force the reader to infer too much. Art is supposed to allow the viewer to come to their own conclusions, and I think removing the plaques would help with that.
For the art pieces themselves, I definitely feel that the Purple Heart and the handcuffs/needle exhibits are the most poignant. The Bottle/Pill/Paper exhibit isn't horrible, but I would suggest giving them a specific order in which they appear. This can help establish the order of events as they happened. If that was already intended, it could be made slightly clearer.
The last exhibit has a few issues, such as it feeling like a wall of text. If you could put the loop in a bulleted or numbered list, it would make it easier to read. This exhibit is the one that seems the most on the nose. I really don't know how much help I can be here, as this is inherently a piece about art, I don't want to make suggestions that could detract from their (and therefore your) artistic vision. My first thought when I read this piece was to let it be in snapshots, with the subject's voiceover accompanying it. Just two or three shots of the preceding days up to his suicide. Like I said though, I don't feel super comfortable making suggestions, due to the poignancy this piece is aiming for.
The last exhibit I'm going over is the first one. While it's not as on-the-nose as the last exhibit, it's still fairly straight-forward without much room for interpretation. I really don't know how to fix that, but my next suggestion may help you come up with something.
I feel a fault with the first exhibit is that it ends with just his childhood. While that's perfectly fine, I never got to see what happened in the years between then and when he joined the military and caused the inspiration for the second exhibit. It's just a fairly large jump in what is otherwise a fairly coherent, biographical narrative explored through anomalous art. Adding an exhibit for those between years could help, but I'd understand if you choose not to add anything.
Overall, I really love this piece. The emotion is raw. The writing is good. And the story it tells is realistic and saddening. I'd upvote this piece if I saw it, but I feel a few small changes could help the piece.