You explained it so well. I'm happy I'm not the only one feeling like this. All of Su-ah demands are his own self-interest. If he truly loved and wanted to be Juhyeok, he would be patient and work issues out with Juhyeok. Help him grow out and conquer his insecurities.
See what gets me is Juhyeok has high stakes at this point in time. His Judo competition and Judo in general. Judo is so important to Juhyeok, of course he would do anything to make sure he can still compete. Su-ah should damn sure know that, and wouldn't be using this manipulative tactic on someone he claims he wants to be with. Especially right now! Urghhh I hope we see growth in Su-ah soon cause this is burning me to a crisp.
Listen, did Su Ah essentially drug him against his will for years? YES
Was it known it would fuck up his body? Yes, we saw in the flashback a doctor warned about this years ago and MC beat his ass and told him never to do it again
Did he never do it again? No he kept doing it
Is it illegal? Yes Juhyeok could get his ass sent to prison for the constant scenting not to mention the sexual assault
Did he create a situation where Juhyeok is dependent on him but he could leave Juhyeok for someone else or even just being single at any time? Yes
BUT you are forgetting. Su Ah is very very pretty when he cries. SO pretty. I love this terrible man (but would perfectly understand if Juhyeok murdered him)

That's so fucked up. If Juhyeok says no, what then? Su Ha knows he needs him, they both know it so Juhyeok CAN'T say no which is so fucked up. Will he not scent him anymore? He's not giving him a choice and that's no foundation for a real relationship. He's basically blackmailing him into a relationship with him. And Juhyeok showed actually remorse for the hurt he caused. But all Su Ah can think about is obtaining Juhyeok. Juhyeok acts like he has all the power because Su Ah is the one that wants him but they both know who has the power. And now Su Ah is using that power to force him into a relationship.
There is a very big power imbalance here. This is manipulative as fuck. And I could forgive the date and a kiss. But sex? When Juhyeok clearly seemed uncomfortable with that?;That's so fucked up. "Be my boyfriend, have sex with me even though you don't want to and I'll scent and if you don't I won't scent you which will LITERALLY ruin your life." Is he not concerned that would breed even more resent than there already is? Just when you think Su Ah can't do anything more fucked up than what he's already done. I was hoping seeing Juhyeok isn't only desired by him would make him get his shit together but it just gets worse.
He acts all sweet and innocent but BOOM. Manipulative Alpha. And this isn't a deal breaker for me. I'm still going to read this cause it's juicy as fuck but I'm still holding out hope that Su Ah will do better going forward.
But seeing his defenders make me so mad. They want Juhyeok to suffer but Su Ah to not at all even though he did WAY worse than Juhyeok ever did. Yes he was an asshole but he has the right to be ESPECIALLY after this shit and he did apologize. What the fuck did Su Ah do besides be a fucking menace? That whole "I'm crying feel sorry for me shit" never worked on me.