OP it sounds like yours is too ill atm to live independently but it takes a long time to get a flat and it will take ages to transition him. Mine is 35 now and a dreadful nuisance but at least finally, finally actually living in his flat.
Yesterday I washed up, I got him to dry a few of the dishes. I wiped down half of the kitchen and tried to get him to wipe down the other half. It's insane, I'm insane.
Looking back i can see that my one has been odd his whole life.
He has never amused himself in his life, couldn't play with a toy alone or read a book independently. He is very fearful / aggressive and complains obsessively.
At first i just thought boys had a lot of energy and needed a lot of direction but then I had another boy.
I wish I'd realised earlier that he needed something else. But what? I'd like to get him on mood stabilising drugs but he says no. And his persistent depression, looking back, has been there always.
He's very blank faced and only happy at the exact second he gets something he's pestered for, and then the complaining starts again.
He's very intelligent which i think has worked against him because he coasted through secondary school and no one picked up on any nd.
I was incredibly wild as a teenager and stopped being risky and irresponsible at 18 and assumed he was doing the same.