I don't hate her. Broken characters are the ones most rife for character development. And for her case, most of it origins with her mother and things out of her own control. In that regard, even Kon has it easier, since she's so much more self-aware, and should've been a better person. So she also has some growing up to do. And our MC, while a great person, probably won't change too much.
Slightly tangentially, most of the time when someone says, "Am I the only one?" the answer is no, and the question is just a dumb attention-seeking ploy. But in this case I think it's a fair question, since she seems universally hated.