You can't see what the rest of us see, that's ok, neither could we when we were in your shoes.
You will look back on this and kick yourself for not having done it sooner. Your DC will flourish, quickly too. You won't ever regret leaving.
Remember he chose to make your life like this. HE did. He could have treated you better but didn't want to.
In time he'd do the same to your DC, without fail, or else he's love bomb them to undermine YOUR relationship with them, so they'd join in the abuse of you.
There is only one way out of this, and that is for you to leave.
We'll be with you as long as you need us to.
You will be scared, you will wobble, you will second guess.
You need to remain focussed on your future, no matter what he does/says.
When you are out you will have a rush of feelings in thé aftermath. This too is to be expected. We will guide you through that to.
You have to do this, sooner or later.
The sooner you do it, the sooner you will start to heal, the least amount of your life you will waste.
This man will NEVER get any better, only ever worse.