You’re so right that it’s difficult to undo the damage and just unhear what they’ve said. I vividly remember a time when I tried several different reactions to his lecturing of me. The worst thing I did was remain completely silent. It enraged him and he spewed the most hateful things to me and it was nearly impossible to remain quiet. His words were 100% wrong, but so painful to hear that I NEEDED him to stop talking. Hopefully it’s helpful to know that anything they say is purely their own problem, not yours. Often what they’re saying is exactly how they feel about themselves. They are doing it completely for your reaction.
Unfortunately it never gets better, so if you think it’s magically going to stop.. or get better.. you’re wrong đ I’m sorry that you have to deal with it. You’re also giving him exactly what he wants by believing any of the stuff he tells you. He’s the coward. He’s the liar. Let him lie in his own bed.