This is abusive and damaging to you and your daughter. Someone else commented that he knows it is hurtful, already, and while I agree, I don't think he believes there is anything wrong with it. So, my approach would be to talk to him about it one last time. In that conversation, I would ask him how it would feel if you continually brought up one of his flaws in a shaming manner. Ask him, how would it feel if you said something cruel about, say, his stank ass personality twice a week, out of the blue. Like, you are having a nice day, and you just blurt, Jeez, hon, your personality is terrible. I just want you to be mentally healthy! Lol.

Seriously, if you want, give him one chance and ask him to put the shoe on his foot for a minute. If that doesnt stop him, your next step is to tell him the subject is off limits, period. If he violates that boundary, you have nowhere else to go besides counseling or divorce.