Blame game.!!

Ladies if you ex husband is fighting for half custody of son when he has never cared for baby like a father should and his response to you as in why he was shitty is “because I was so miserable with you in the relationship, that is why I was a shitty father” what would your response be.??

Ughhhh he always blames me for everything for him cheating, for his lies etc.!! Im so desperate for the divorce to be final.!