As can be infuriating. You realize there's a problem and instead of being solution based with you they fight the solution! I feel you!
My ex was the one to walk out the door yet he's been very snarky and rude whenever possible; saying that he can't wait to be done with me, even though he replaced me the same night he left. It makes me scratch my head it's so backwards
They defy logic. They can't accept reality because if they do then they'll have to admit there's a problem and goodness knows they can't do that!
Happy to hear you are doing what you have to do for you