He does have a good reason BUT it's not valid with the way he treats Suah. We need to understand that Suah never wanted to be an Alpha as well. Ever since he found out he's an Alpha, he's been compromising and adjusting to accommodate Juhyeok. Juhyeok promised to be together with Suah all their childhood. Then suddenly abandoned him the moment he found out their genders are opposite of what he's expecting them to be. So as a child, I can't blame Suah for doing what he did. He was grasping at anything to keep what was promised to him. I do feel bad for Juhyeok but he needs to stop being an asshole. They both don't want to be the gender they're given and it's obvious he's aware of it. But he's being selfish and kept on victimizing himself just to justify how badly he's treating Suah.
I honestly agree, and im glad u clarified that he has a good reason but doesnt justify how he treats suah. but thats just something that has to happen for the plot tbh, hes gonna end up seeing how much suah does for him or theres gonn be some sort of misunderstanding and juhyeoks gonna have some realization that hes selfish in order for their relationship to progress

i can’t be the only one who thinks juhyeok has a good reason for being upset with suah. especially after finding out that the reason he can’t control his pheromones or heat is because of suah (WHO DID IT ON PURPOSE!!!) i get it. also i wouldn’t want to be an omega in the world either but i do think he needs to come to terms with it eventually tho i do understand why he’s upset about it in the first place. idk idk i just feel so bad for him