I think the main issue most people are pointing out is that it was rumored that the author was gonna let them have a threesome and didn’t show much hate towards the character. Pretty sure they aren’t stupid to not recognize an antagonist vs a favored red flag the author wants to push into the relationship.
I can’t see I know exactly what the author is thinking and I’m just hoping it doesn’t go down that route of glorifying him

not every manhwa is gonna be sunshine lollipops i think baek muyeol sucks but he sucks bc the author designed the character to suck. he very much has a purpose in the plot, and its to antagonize the main characters if you read literally ANY book, like regular books, antagonists exist for a reason or else this would js be boring nothingburger slop