That's kind of broad. It really depends. Like for example Miciah from Fire Emblem is really unlikable, but I forgot about her until you mentioned this topic. She was one of the main protagonists from the Wii era Fire Emblem and she was willing to cause genocide for her cause. A lot of her traits were swept under the rug and it was only Soren if you had him attack her on stage during a certain level that tore her a new one for how hypocritical she was.
On the same note, I feel like Rose Quartz from Steven Universe fits this bill to for the same reasons as Miciah.