Is it normal to feel so up and down? One minute I’m feeling positive and know I’m making the right decision. The next I’m doubting myself.
It's 1000% normal. We cling to what we know, even if it's bad. We fear what we do not know even if it's the right thing to do.
Is it me?
No, it's not you, it's HIM.
Should I just accept that ‘this is how he is’ and just try and carry on?
I think you know the answer, love. No one should ever accept less than being treated with kindness and respect. No one should ever live in a home where their children are frightening and bullied. And it's not 'just how he is'. This is how he chooses to behave. Huge difference.
Do I tell him to go to stress/anger management first to see if he can change?
No. You leave first. If after you've left, he sincerely regrets his behavior, if he sincerely wants to change, he will do so because he knows he is wrong and needs to change. For himself. Not because he's trying to 'earn his way back'. That type of forced change never lasts.
Or do I just give up and tell him I’ve had enough?
Telling him you've had enough is not giving up. You are making a deliberate choice to have a better life. That's the opposite of 'giving up'. That's stepping up bravely and taking control.