Sylvanas.
She’s never been an interesting character. Not even a little. Yet a cult following if players including at least one questionable lead developer get their epeens all worked up over their edgy corpse waifu and subject the rest of us to their degeneracy.
Sylvanas. Anduin is a close second.
Thalyssra.
Spends an entire expansion going against her “corrupt” leader who was practically forced to help the Legion for not foreseeing our deus ex machina abilities of transcending perceived futures. Goes on and on about how Elisande was this evil incarnate character. Next expansion, pretty much sides with a character worse than Elisande and helps mass slaughter and genocide an entire race of civilians consisting of the people who helped save her city. Then proceeds to backup that leader the entire expansion, and only rebels when her life is put in danger because she is betrayed alongside Lor’themar. If I could go back in time, I would rather try to convince Elisande there is another way and slay Thalyssra lol.
Sylvanas.
She’s barely a character, more like a lore blackhole.
Baine. I want to skin him, and make his hide into a drum to beat.
Didn’t care much for Varian up until he died. Him falling and destroying that mech and that “For the ALLIANCE” to Gul’dan was good. Like. Dang. Even my hordie self was just “okay that was dope”
Sylvanas. Not just now either, I’ve disliked her strongly since WC3. She’s never been a likable character to me. I’m so glad she was villain batted because we can hopefully be done with her after this. 
Weirdly Nathanos never bothered me as much as her, he was alright.
Second would be Tyrande probably. I don’t hate her, but I don’t like her. She’s kind of hot headed, impulsive, a little annoying. I think Shandris would be a much better leader. Or anyone else.
I don’t exactly hate any characters. That being said, I don’t really like Talanji as she currently stands. Hopefully Shadows Rising will fix the problems with her.
All those guards who threw cabbages and spit on me when I came to SW for the first time 
Easily Nathanos
I get the appeal of having a character that’s kinda a dick, however he is used WAY too much if that’s the role he’s gonna serve.
I like nathanos I just wish the writers didn’t use him so much. He’s better in small doses.
Nathanos. He’s a lackey who snarls at everyone else who is a lackey. Also he’s ugly.
Sylvanas, with Nathanos being a close second. They could have both been replaced by Gallywix for the Horde campaign, and I would have been a lot happier.
I have to admit, I hated Varian till he died.
He got a warriors death with a cinematic to boot.
Cairne and Vol’jin both deserved the same kind of send off, considering they were founders of the Horde and here since day 1.
As much story as Surfing got, I wish he would have had a more warrior send off and not just go out like a sacrificial lamb.
To be fair Sylv had to nuke him down after she got all butt hurt.
I used to like Slyvanas as a character, now she’s just tiresome.
I really like Elisande. She is given a bad rap. I would rather have her turn good then having to kill her.
baine
It’s a toss up between Mechatorque, Anduin, and Baine. Mecha is a gnome, I don’t like gnomes. And Anduin and Baine are push overs. It doesn’t help Anduin reminds me of Justin Bieber lol.