I tend not to hate characters that the writers want me to hate. The qualities that they try to use to do that generally just kind of make me hate the writing.
My dislike generally tends to go to characters who I'm expected to have positive attachments to without any events transpiring that would prompt that.
But Morrigan from Dragon Age got to me. Maybe there's just something unique about how one autistic nihilist can inspire rage in another nihilistic autist.