Hermione wasn't sure she had the right to intervene. Didn't he deserve to be angry for what she did to him? For the lies and the manipulations? Ginny wasn't even willing to fight back. All of her energy was gone. There came a point when everyone finally broke. She didn't have anything left inside of her. Rodolphus had helped to strip that away with years of never-ending fear and shame. She deserved pity, but she also had to face the consequences of her actions.