Hi! I suggest u to take the time and read the manga again from the start (just the important parts) at least it helped me to understand a bit better the characters and you’ll see how juwon uses his leader position to manipulate everyone around him to do what he wants. Like the time when he told the manager to cancel his and chansol schedules only just to force a moment with him.
He is also posesive with chansol when in fact they are nothing but he’s always asking him where he’s is, when he is coming back, who texts him or calls him. Like ?? He’s not his bf so why should chansol report every little thing to him? And he talked to taeha like “u touched him first” like chansol is some kind of trophy he wants to have. Fortunately taeha was able to read him (he was already paying attention to his behavior from the start) and concluded he’s a snake, which he is.
And in this particular last chapter we see how he uses emotional manipulation with the blonde one, sth that he has being doing with chansol all this time, and the faces he makes…. He’s always clenching his jaw when sth don’t go his way
Taeha on the other hand is always looking for chansol without forcing himself on him, (like chansol literally offered himself to him and he refused him then the whole call happened) but he’s totally worried about his condition and every time the omega needs help he’s the one that is there for him. Yet he can’t acknowledge his feelings for chansol so he got totally shocked when juwon told that to his face. Chansol as well is paying more and more attention to taeha yet still thinks he’s a bastard haha but at least they are friends now if we take what he wrote in that letter he left for him.
Sorry if my answer is long I didn’t intended to be an “analysis” but I’m really enjoying this story even tho seems like a pwp haha and forgive my mistakes English is not my first language but I hope it answer ur question at least to why I’m rooting for taeha

JUWON LOOKS LIKE A GOOD PERSON
I MEAN YOU DONT KNOW IF HE IS BAD