I second this. One can get support renting a place oneself or by means of a “wohngruppe”. Same here in the Netherlands.
Some friends of my son, friends we know for years live this way, having a spacious student like room and get mental / social / medical help, can interact with others in the group if they want to or not. They are clearly better off than at home in their opinion.
I strongly agree that betreues wohnen would be the first big step solving the mental burden from abuse and neglect.
Probably “that guy from the 4th floor”.