You're right.. He is the product of a very dysfunctional family with 2 parents who HATED each other. Remember the movie War of the Roses? that's them. So anytime I do anything like that, he calls me by his mother's first name.
He is walking in his parents footsteps. Do not enable this.
Burn this statement into your head: "I am sorry you feel that way" and just stare into his eyes. Listen. Be a broken record. When you want to argue, VALIDATE and empathize. DO NOT PULL THE ROPE.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712