I shouldn't even explain this but since you have assumed it: actually chemistry has nothing to do with unhealthy relationship to me. Honestly I just didn't see interest nor affection from Jihye, never in his eyes. Believe it or not but I live for cute fluffy stories. Not that I think it's wrong to like unhealthy dynamics, it happened also to me, we are all enjoying fiction after all.
Btw everyone has his taste and who likes them as a couple shouldn't feel bothered by others opinion, no one is right or wrong it's just personal taste. just I don't like that you came with this assumption because it doesn't have anything to do with my real reason to dislike them. Sorry if I am rude to you, not my intention.
I know I will get a lot of dislikes but I can't help, I really wish I felt different, but to me Gyoon and Jihye had no chemistry, I found them forced. I don't know if I I feel like this because I binge read the second season but they didn't give me anything, no feels, nothing. Instead I found more interesting all the dynamic with mr Soh, and until the end I hoped that he didn't really like the chairwoman or that he would say that he looked at the chairwoman like that only because he could see Gyoon in her and not the opposite.