I'm not sure why people hate Bella...she put everyones life before her own...she accepted the vamps and the serigala for who they were and not what they were....so in answer to your question...no I dont hate Bella and since I dont personally know Kristen Stewart I cant say that I hate her either.
I personally, dislike bella too. firstly, shes a bit of a damsel in distress, either jacob atau edward will always aman, brankas her: she cant do it herself! and im a feminist, so i hate the thought of the guys simply feeling like they have to "Protect" there girlfriends like they cant look after themselves. although jacob was lebih understanding. <3
I also dislike her obvious dis-respect for jacob. as seen in breaking dawn book..(sigh) not because she chose edward over jakey, but simply because she did it so harsly, forgiving the edward that left her in new moon as soon as he came back, deserting and discarding jacob untill she needed his help again...
well, i don't dislike bella, she'es kind of funny sometimes, i just hate she choose edward, but i totally hate kristen, she can not make me feel like i'm watchin' bella when i watch the movies. She's not the bella i imagined at all.