I don't know about others, but I didn't like her because I had such high hopes for character, granted that I haven't actually read the novels, but from what I heard about her; from slave to Warden to Grand Enchanter, I was expecting someone, I don't know, less pathetic...
Seriously I didn't hate her, I pitied her, to a point. I was expecting someone ballsy and manipulative and/or arrogant ( like Vivienne, though I don't know what she has done to be arrogant about) or at the very least competent. All I found was a mewling kitten begging to be saved from the 'evulz magisterz'.
And after all said and done, after she sold her people in slavery to free them from 'teh oppressive templaaars', after I saved her from her epic failure and still offered an alliance, she had the audacity to tell me, that if given a choice, she'd do it all again. Yeah, maybe I do hate her a bit.