You are mixing and excluding a LOT of details. First of all is the time period, a LOT of years passed by since they found out that it was Su Ah's fault, and b4 that the other guy didn't treat him bad bc of it, he treated Su Ah bad bc he was embarrassed (he was an Omega, not an alpha. And even then, he wasn't really treating him like shit, he was avoiding him until he found out that it was Su Ah's fault), when he found out he told Su Ah to stop meeting him, and basically tried to cut ties, thing that Su Ah didn't want (and basically never stopped). He was almost raped bc of Su Ah's fault?? I think we already know that it was Su Ah's fault, I even think he apologised for it. I think you are trying too hard to defend him. Yes, the other guy is using him; yes, he is facing the consequences for something he started when he was a child; and yes, he will keep facing the consequences for something he kept doing against the other guy's will, even as an adult (as we saw in the first chapters). He is treating Su Ah that way bc HE DOESN'T WANT SU AH ANYMOREEE, SU AH IS PUSHING EVERYTHINGGG (╯°Д °)╯╧╧
Point one when he came to the party he threw the flowers in his face on top of that he’s been hitting him the whole manwha so far just because he’s embarrassed doesn’t give him an excuse to treat him like shi because he didn’t get the secondary gender he wanted and like you said the only reason he his treating him like that is because of his secondary gender point 2 when he stop cover him in his pheromones he was almost attacked that’s not his fault but he admits his self that the pheromones have actually been helping him leading to the whole using su ah as a cum machine which I’m not saying it’s wrong bc su ah actually wanted to do it a didn’t mind doing that but for this whole manwha he has been treating him like his feelings don’t matter since they were kids bc he’s been so caught up with his secondary gender Su ah is definitely wrong asf for cover him in his pheromones without his permission but I feel like people are excusing the MC behavior bc he’s an omega tbh they both are kinda of terrible to me but I just don’t understand why the MC started treating his childhood friend who cared about him before they found out about their genders like shi if anything I would think it would have made them closer idk tbh I don’t think it’s worth finishing (づ ̄ ³ ̄)づ

Yall keep saying these are the consequences of his actions bruh he was a child when he first started covering him in pheromones and didn’t know it was wrong yes he should have stop when he found out it was wrong fair but juhyeok started treating him like shi the moment he found out his secondary gender like it was his fault or smt on top of that he started using him as a cum pump for his own personal reasons Su ah at least did what he did to protect juhyeok. shi he almost got raped in the first few chapters without his pheromones they both wrong but juhyeok is pissing me off treating his one and only friend that loved him before they got their secondary genders like that ヽ(`Д´)ノ