I knew I didn't come on strong enough with my opinion. lol
I don't think he HAD a "reason". As I said, he didn't have control of his emotions.
I think where he killed himself, however he did it, he didn't think about it becoming underwater in a few days or weeks. OR maybe somebody did kill him. I would have wanted to.
I think he fancied himself being an outdoorsman because of his concern for the environment (which isn't worth much if you're not equally concerned about human life), I don't think he was one. Or at least not a "hiding out and roughing it" outdoorsman. Basically, this dude failed at being a human.