I don't hate any actress. I'm more into disliking actors, really.
And since Koreans are masters in creating hateful female characters, I won't bore anyone with a neverending list.
I do believe there are a couple of actresses who are in need of some acting lessons, though.
One is Uee, the one who played in You're Beautiful. I wonder why she was casted, honestly, since she's constantly referred to as a beauty while I found her vulgar looking. I certainly don't hate her, and if she improves her acting skills, I'll be more than happy to change idea on her.
Ditto for Koo Hye Sun, the one who played Jan Di in BBF. Admittedly, I have seen her only in that drama, maybe her wooden acting was a direction choice, since everyone in that show looked as if they were made out of wood - or marble. Again, I don't dislike the actress at all, I just think she didn't show great acting skills.