This guy is not in a good way. His hatred will hurt him more than it could ever hurt you. Honestly, I can only agree with your assessment of him in your last phone conversation. He wasn’t a good person, and it’s come back to bite him. His feeble raging at you doesn’t mean that he doesn’t recognise he brought this on himself.

Don’t worry about his hatred. That’s his burden to bear. Yours is only to let go without bitterness. As you said yourself, learn and move on. Have patience with yourself. The future will find you.