I really understand why fans have problem with this season, for me the cheating plot is also a HUGE turn off.
BUT!
The chemistry between KornxKnock is insane, all of their scenes are just on spot. As everyone else I loved their make up scene, but the real deal is their break up - I am not a crier, but in this case I was crying so hard, it was so painful to watch (they were breaking up while hugging eo for God´s sake!). Well I have of course problem with the cheating - it was totally awful and also horribly acted - yes I am looking at you, Max, but I guess it happens when you should play something so out of your character ( Korn and cheating what the duck??) and especially when there is no real reason for that ( that guy is just repulsive and you have your literal wet dream at home whom you love for life). So all in all KornxKnock reign as always, love them.
I had problem with Yihwa and Cho, and not because Yihwa kissed someone else and than took time to sort things out (we all should be like this IRL!!), but I just did not feel the love between them, if KK were on fire, these two were just..not.
Bright/Farm/Rit mess is just that, a mess, so I am not going to start to explain how I feel about that.
So if you are looking for a cute gay story, this is definitely not for you. But if you want some more mature themes with actors who have some of the best chemistry you can find in dramas, just go for it. Definitely worth watching!!