I like this genre, I really do; absolutely love villaness isekai!
But this thing, this... stupid, idiotic trope (!) of "not knowing why" that happens every time (Page 5, in this case)....
"Oh, noes! I better be careful because I'm not sure if it was the physical and emotional torture that gets me killed, or if it's just because of my hair colour!"
.....
SMDH
I mean, you played the game, right? And he said it was your words and actions that broke the engagement, right?
If it isn't your words and actions, then you're gonna die even if he has to hunt you down, so... instead of doing stupid shit that no adult would ever do, just don't be a cunt to the MC, and don't try to murder her; it’s not like those things are accidental, so... be nice, and you don't die.
Just like the real world.