He's the one cheating. But he sure loves to provide you with a laundry list of everything you did wrong and then punish you for it.
I would call his bluff. If he wants out so badly because you are such an awful, horrible human being, who didn't listen, or wake him up on time, or forgot to take his clothes out of the dryer, or because you don't have the body of a 20 year old anymore, then he can leave. Show him the door.
"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