Maybe it wasn't the decision that she would've made in the past when she was faced with the possibility of finding and defeating one of her enemies, but Hermione knew that she was making the right decision when she ripped the plush dragon out of Ginny's hand. What was the point in her continuing to fight and live if the world was so bleak and violent that she would willingly sacrifice an innocent child for her own revenge? She wasn't the same person she used to be. Whether she was glad of that fact or not remained to be seen.