I feel like that now about not experiencing physical violence. He would threaten it, wave knives around in arguments if he was doing something
Abuse is something that starts out almost imperceptibly and then escalates. So if you DIDN'T back down/submit etc at some point he WOULD get physical to MAKE you do what he wanted you to do.
Abusers do whatever it takes - the minimum it takes to get you to do what they want you to do. So if "do this or I'll leave you works' that's what he'll threaten.
"do this or I'll tell all your friends/family/kids what kind of whore/slag/slut/bitch/liar you are"
"If you don't call me and answer my 150 scullion calls per hour if you dare to go out, I'll be gone by the time you get back'
"If you don't back down/do as I say, I'll use this knife/fist etc.."
When you get the Lundy Bancroft book you will see just how these pathetic individuals are all the same and that the only way to deal with them is to NOT deal with them. Grey rock, ignore them and remove all power from them.
If he does try the legal bullying route, you can potentially look at getting Legal Aid, AND you can get a lot of things done yourself with minimum back up from a lawyer. You can speak to Rights of Women they have legal teams to help abuse victims, you can ask CAB to help too, you have options.
And you have us too :D. don't be afraid of him. He bullies out of weakness and fear, not strength and power. You have shown the world that actually YOU have more strength than he does... He underestimated you - that is why he's pissed off!
He spent all that time grooming you to put up with his shit, now you have dumped him he has to find some other mug to bully, and he will have to pretend to be nice for aaaaages to get a new victim.
These abusers are awful people, being nice for them is tortuous and they find it as exhausting as we do to be tough and 'mean'.