Rarely are any endings nice endings. Once it becomes a divorce it’s rarely amicable. It doesn’t have to be an ugly war. Even if the other person behaves aggressively, you can stay calm but firm. You don’t have to get into the mud with them.

He won’t be the first husband to go around telling people his ex was crazy, lol. Don’t worry about what he thinks of you or says about you. People take it with a grain of salt, don’t care, and judge you as they know you to be.