Since the school rats spread the word about her kiss with Draco, and him dedicating his win for her, quite publicly, she was more hated then before. Hermione honestly couldn't believe they still cared about the house rivalry or who kissed who thing, it seemed childish to her and quite frankly immature. Sure, not all of her fellow classmates where nasty to her but she didn't even try to befriend others since there was no point in that, at least in her eyes.