Yeah, ngl, the author did not deserve for this to serialized. This is plain terrible and uncomfortable, not endearing at all anymore. Typing this as a fan of the series up until this point, btw.
Prez is a secondary character by now. The other guy is not the good kind of annoying but just a shit tool character with some of the worst writing and I as the reader dislike her more than before.. well done author? What was the point of these chapters?
I believe in the "old story" the MCs met before when very young. Why did she agree to marry another boy here? Was the whole prologue retconned? Why push it to the max with no foundation? I get that these are the usual Shoujo plotholes but holy shit, this is BAD bad.