Sean Astin's character is the *beep* of the century

I know he was being kept captive and I have no idea how he was treated but he didn't look like he was getting tortured. So what does he do? He cuts himself and pretty much sentences some rando dud to death because he's sad. Grow the *beep* up, he saw how *beep* up this virus was in that village or whatever. Then he infected the mouse and the bottles of water at the end and just drives away in his little boat. I really felt like he was out to end the world and that makes him not *beep* of the century but probably the millennium. I had such a huge problem with his character. It reminded me of the guy at the end of the cabin in the woods, just *beep* it and *beep* everybody. Ugh