This, sadly, is my brother (aged 43) although he's not a gamer, doesn't take drugs. He does have depression. A few years ago our mum died and he finally moved out to retrain. It took a while for him to find a job and when he did, it wasn't what he wanted but he needed to start earning. And then Covid hit, his MH took a nosedive, he got signed off sick and it all went to shit. He eventually quit, moved back in with my dad and has been there ever since.
He does lots around the house and garden, helps friends with DIY etc but he just won't apply for jobs. I think he is scared of rejection having been unemployed for so long, and having to explain why in interviews. However, he's also essentially just pleasing himself, doing whatever he wants with his day, and I get a bit resentful because I work full time, am 100% responsible for my rent and bills etc while he lives at home and doesn't contribute financially.
I have spoken to my dad about it many times; he's tried to get my brother to look for jobs but my brother can be very manipulative - he will become tearful when dad speaks to him about jobs, but not with me. It is complicated by dad giving us some early inheritance - I am using it to buy a house but my brother seems to be living off his. It means he has no incentive to change.
I have asked them both what happens when dad dies. Hopefully a way off but he's late 70s so we need to be realistic. I have told dad that I don't want to be joint executor with my brother because if he refuses to sell the house once dad's gone, where does that leave me? I actually want my dad to get proper legal advice on this but he's so passive. The other issue I've raised is what happens if dad becomes unwell and needs care? That will fall to my brother if he stays at home. That might be the push he needs to move out. I don't really know what to do.