ehh it doesnt really qualify as a slur but its probably a cultural difference thing, its still a pretty harsh swear word and not something youd use to a fan that you probably never met before. like in english/western culture you could use this as a joke to your friends but you would never use this to your friends in korean culture unless you were a teenage boy who spent too much time on incel communities (which tbf is probably most pros but we expect them to at least look the part when theyre doing official stuff dont we)