She acted reasonable, Maintained distance from assad from chapter 1 and pushed princess x him at every chance she could and stated multiple times she wanted to break it off, They would feel they were thrown away? Rather none of her concern since she wasnt into Polygamy and wanted her and her family survival more than feeling of some novel character she is meeting for the first time. Assad was a war hero with King Backing, someone far more than capable of eventually deleting Ayne existence from the verse.
Ciel aka the beastman was not devoid of problems too. Re-incaranted Ayne never wanted a Pet human, so keeping him because he already was there is maximum copium of wanting reverse harem. She wanted to release him so he is no longer part of her life (Not to mention Ciel almost killed her maid, there were open attacks by beast extremists who were willing to kill anyone who was slaving beasts and ayne was attacked multiple times in story due to said beastmen and you say he posed no threat???
Jay despite being assassin guild leader was unironically cleanest of the 3, as he didnt have a Princess gunning for him nor entire clan of beasts hunting people down. Ayne did try to break things nicely with him too, but as I said in start, Jay was likely the only geniuene lover of the three in 1st place (unlike slavery and forced contract) so them opening up to each other was valid.

Ayne (the main character) is the worst character I have ever read about in isekai Korean webtoons. Like for real. She is constantly surprised with the stuff that's happening eve though it's pretty much due to her own actions...and the way people react to Ayne is so unrealistic. Yeah, she's the daughter of a Duke and really rich, but it's basically common knowledge that she goes through men left and right. And yet there has not been a single person commenting on that. Not to mention the fact that the author knows astoundingly little about the basic medieval Europe or Victorian Europe setting she is trying to emulate. I may not be an expert but literally everyone knows that the Pope and several men of the clergy were celibate and swore off contact with women yet one of the Male leads, a dude named Jay (which is such a weird name...!!) is given the role of "chancellor" and is basically successor to the Pope yet regularly drops into MC's room to tease/try to date her. Like what the 😕
Nobody EVER calls out Ayne out on her bull. She is stringing three dudes along by the nose, being super indecisive on choosing one, yet gets angry when her FIANCE professes his love/ confides in her that he is uncomfortable with her habit of dating multiple men.
Why would she get mad😕 He has a right to say this.
He didnt even get mad. Meanwhile in the comments people are cheering MC on, trash talking the Fiance for even daring to point out that shes acting like an inconsiderate piece of scum. Also, her third "catch" is a beastkin dog-guy who is a slave and has lived in slavery for many years. Now that alone is already YIKES but it's even worse because he is VERY attached to her bc she treated him like a dog and fed him/petted him and after he showed romantic affection, she began acting like he was a giant bother and wouldn't even try to act like he was in the running to win her love lol. She is just awful, and it seems like some fans of this webtoon mistakenly believe it's okay for her to treat the guys like dirt because "she is a queen" lol okay, change the genders around & the guy would rightfully be labelled a douche and a scumbag. And that's what she is in my opinion.

At chapter 85-86, she finally takes action and tries to talk about making a peace treaty with the beastmen. So I like that part.