won't hear a word (said) against someone/something idiom
听不进一句（针对…的）坏话
If you won't hear a word said against someone or something, you refuse to believe anything bad about him, her, or it.
He's completely infatuated with the woman and won't hear a word said against her. 他被这个女人迷得神魂颠倒，听不进一句她的坏话。