Why does my dad have an issue with me moving?

So I’ve lived with my parents my entire life and I’m in my early 20s. The problem is I’ve had a very toxic relationship with my parents like physical mental abuse you name it.

Sometimes we are good sometimes they say things that trigger me from the past stuff that they did. At the moment we are good.

I tried moving out years ago but they weren’t happy. Now I’m in my early twenties whenever it’s time for me to move out they become so nice and kind finding ways to keep me to stay.

When they realise I’m not buying it extremely cold and angry I’m so confused because I literally don’t have a life. He says he wants me to stay with them
And be a family and get through things together but I literally don’t have a life I don’t have friends and I don’t even see him because I’m always in my room.

I don’t understand why he won’t let me
Go what’s the problem with me wanting to move and find a life? I’ve tried asking him why he pretends that it’s all in my head but it’s so obvious because the other day he mentioned it and got annoyed acting like it was HIM kicking ME out.
Why does my dad have an issue with me moving?
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