Even if Kingsley and Percy admonished her use of the Knockback Jinx, she didn’t care. Ron had deserved it. It sent a message not to cross her. She supposed she was more upset at the betrayal and loss of a longtime friend. While some girls may have taken his "frigid bitch" insult to heart (and the fact that he was apparently getting a good laugh at her with Seamus and Dean), Hermione knew better. Ron was good looking enough; it was just that she hated herself so much lately; too much to give of herself in the way a physical relationship demanded. Ron would never get that through his thick skull.