So sorry for your troubles. Most of the people I've known who got divorced or separated went through a painful time for a while, but ultimately were MUCH happier. I feel there are ways to make new friends at any age. You sound like a reasonable person who surely can make new connections in the future.

Regarding the fights and verbal abuse, a friend taught me a trick that has occasionally helped me. Basically, if a toxic type of interaction happens over and over again with the same person, then you just come up with a sentence that you say in response to it. For instance, my mother has boundary issues with me and gets on my case about my colleagues "taking advantage" of me. So I just have my sentence: "Mom, I don't discuss the details of company business with you." Perhaps you could come up with a phrase to help you engage less during those verbal fights: "Sweetie, I won't engage with you when you choose to get nasty." Or something...? The trick is you repeat it. So if my mom then keeps pushing to know something about my company's finances, I'll just say it again--"Mom, I do not talk company business with you." It's like a wall you put up.

Good luck.