Hi and welcome, saskia
As you have probably already figured out, your son likely is not going to change while living in your home.
While the situation is intolerable for you, it seems to be working just fine for him.
He is holding you hostage to his moods and demands by his bullying, manipulation, threats, blackmail, extortion, intimidation, etc.
He mainly gets what he wants or there is h*ll to pay.
The best thing you can do for him is to not give in to him, and have consequences for his behavior. If he can’t live in your house and contribute like every other adult is expected to, its probably time for him to leave. His behavior is so extreme, it could escalate into violence, if it hasn’t already.
You may need to get the police involved.
Let us know how you are doing.
Apple