This is a good descriptor for it. The ones who are weird and mostly not hurting people and had potential to do things but are just too mentally broken.Terry Davis is a sadcow. Very few others are. A sadcow is someone more sinned against than sinning.
Another one of those would be that guy calling himself Emperor Tom Nelson, he's that schitzo Indian guy that goes around declaring he's emperor of the whole world and just makes funny youtube or facebook posts but then in his life his mom died and some hooker he likes with lets him be abused by the strange men she fucks.