I think it is hopeless. If you could get Kevin to a place where he could be a functioning member of society, you're also going to get him to a place where he can rationally think about what he has done to his body. Maybe letting him stay a retard is the kindest option at this point. If Kevin actually rejoined reality -- that's a very dark and depressing reality for him. I don't know how you don't 41% when you see how you've permanently ruined your life. Plus his entire "community" would ostracize him if he ever gave up the delusion.
It's one thing to be a soldier who had his junk blown off by an IED. You could learn to live with it thinking that it was for some greater good. Voluntarily cutting off your junk chasing the coom -- well, there's no way to spin that into some kind of noble sacrifice. How do you ever feel good about yourself again when you've done something so incredibly stupid?
Now, if the tides ever change and we start seeing GRS surgery as nothing more than a modern day lobotomy -- maybe he could gain victim status and find his niche that way. It would give him some ass pats on social media and some feeling of importance to lead the fight against what was done to crazy people like him. Until that day, though, he's just going to spiral down.
TBF, with an IED it isn't your fault, you just happened to be in the wrong place with the wrong part. Depending on your injuries if that is what you got it sucks hard, but you still have a working body and can find purpose. I'd say the same for Kevin, but....
...I think his real problem is his lack of motivation to change his habits, comforts, and pleasures. Looking at Chris, you can think back on all the times people tried to influence him positively and how he ignored them, but Chris went full thrust into Barb as soon as a girl said that it would be fine with her. Kevin is kinda like that: he has slightly more self awareness to declare himself a hedonist and recognize his main driving force is self pleasure. The problem is if he's too stubborn, scared, or lazy to outgrow that state. He needs self imposed training, but he won't succeed at it unless he wants to.
If he can't find or refuses to find purpose, then it is better to leave him in his delusions as others have said.
Leave him there a couple years, he'd come back a completely different person. I guarantee it.
Leave him there for a week and he gets eaten by land sharks or get an infected wound or any other dumb shit he may do. Leave him there for a couple of years and all you would find is a skeleton with some transformers drawings on rocks next to it.
I see the most disagreeable part of Kevin to you and you are quite valid as the kids say.
The problem is he'd still have a reminder of his mental illness every time he looked down
So do cutters and eating disorders. Not all is lost for them, just for coomers like Kevin.
Kevin is such a useless fucking consoomer it is obscene.
I wish he'd produce more art. I love autistic arts and crafts time.