I don't think so... The translator left notes, if you read them some explain that the education system in South Korea is actually very competitive. They say that it is less drastic now, but that there're still cases.
spoiler!!
actually, that guy hates semin because semin is kyunghee's bestfriend, and that guy like kyunghee when they still first year.
sorry for my bad english.
That's interesting, i like that the mangaka gave him backstory other than him just being an ass. Still kinda him being an ass, i suppose... hating someone for being friends with your crush? grow up... well, i suppose it might be a little different with a best friend though... idk what to think, but i'm definitely sure he is being drastic and doesn't need to hate semin so much... or at least don't make it so obvious? Like, hate him internally until he gives you an actual reason to say it out loud...
in chap 18/19 he apologize to semin for being so mean ^^
good.
that guy who hates him for being a transfer student probably just likes him and is in denial or just doesn't know how to express his feelings ╮(￣▽￣)╭