Who people are in the present is a product of who they have been in the past. He behaved in a low way in the past. Now he's letting you know he does not plan to change. You are not going to argue him into being what you want him to be. This is who he is. Time to walk away from this relationship. He's not grateful that you took him back.

Threaten to leave him and he will make a bunch of insincere promises. Then he'll break them . . . like he's done before. The sooner you let go, this sooner you can heal from the loss.