@omegaxis1
He did act in a way that could harm her. For example trying to get in the way of her romance life with the prince, stalking, spying on her letters, trying to prevent her from ever marrying, etc... Still, I think he is disgusting for his horrible behavior, not for who he is into.
As per the different timeline, you can't take a love interest seriously when he could very well try to kill you if the situation changes a little... I never understood those stories...
Also, while I do think that wanting to get revenge doesn't seem justified, I'm not sure we can complaining about her being a villainess when it's in the title... It's like watching Overlord to then complain when he does bad stuffs... If she want to kill him for no reason, so be it. EDIT: I mean, it's a story. People can just read another one if they don't like the characters.