Based in your recent update op you absolutely need to go to the police. Tell them about the threats and the assault.
You need their protection.
Op he is even threatening your mum. Police, ASAP.
Get him out and get a doorbell camera.
The only think that works in bullies like him us showing you will reach out to the police and legal avenues.
That doesn't necessarily always work but you have to do what you can to stay safe.
They like to trick you into thinking if you play nice they will play nice back. But in reality if you give an inch,they take a mile. Look at what happened when you shared a room the other night. You gave him the benefit of the doubt and he assaulted you. Twice. That's what monsters do.
The best defence is a strong offence.
Stay elsewhere until the police remove him.
Don't make the mistake of playing nicey nice. All it does is make you vulnerable. They attack nice, they attack compromise, they attack weakness.
Police, legal advice, women's aid, lock change, restraining order, tell any supportive friends and family whats happening. Everything you can to get him away from you. Tell your current/new estate agents once he is gone too so that he cannot ask for the new keys.
It will be a scary time but push through it. Never give an inch. That's the only way you defeat evil. Not by giving in to its demands and thinking that will make life safer for you. It won't. Reach out for help to protect yourself.