OK now this is one of the stupidest tropes on planet fucking earth, the only way it works is if you make your protagonists the most doormat-esqe people ever. Further it usually devolves into actually sexual harassment on the part of the "rival" as theirs no other recourse for them since their...
Man Sedin just seems like a cardboard cutout to me, he's so incredibly boring its not funny.
Isir has to deal with being part of the story and being the crown prince, of course he might be an asshole sometimes.
If I have to read another sentence of this mother shit talking her own son unironically one more time I'm going to tear the fabric of reality to slap her.