Sorry, that directly conflicts with bro code. After a guy and girl have broken up, the guy's friends are required to point out the girl's faults. Kind of a consolation, y'see, to help the guy not feel so bad about losing the girl.
(Although it seems it would make him feel WORSE because he picked such a loser girl in the first place. I don't claim to understand it any better than you. But I have observed it to be a fact, after a breakup the guy AND the girl all have friends telling them what a loser the other person was.)