Because we don't agree with you, i personally think Dojin's treated Hyesung REALLY well the entire story, not just after he "raped" (it is canon that it was an accident, he says this himself AND Hyesung says "his eyes... Get ahold of yourself!" during the scene because he sees Dojin's lost control. No, he didn't use his pheromones to trap Hyesung and rape him or any other nefarious reason like that. He meant to let them out to show Hyesung that he doesn't recognize them because he's never used them on him before, then pull them back in, but he lost control, as he himself says in ch 20. The reason for this is because he had accidentally let slip a small amount of pheromones and Hyesung said "are you threatening me?". He was offended Hyesung was implying he even WOULD threaten him. Heesoo, the beta friend, has established that Dojin doesn't like to use his pheromones on people, he's offended that Hyesung is implying he did it on purpose. I don't personally believe you can rape someone on accident and literally everything we know about rapists says they do it with intent so...) Hyesung. Dojin's been consistently nice to Hyesung the entire manga, what he meant in ch 20 by "i just realized" was that the reason he'd been treating Hyesung so well was because he'd been in love and didn't realize it. Dojin doesn't like omegas because they force out his instincts, he's been confused about Hyesung for a while, but he realized when he found out that Hyesung was pregnant that he'd been in love and THAT'S why he'd been treating him well.
I disagree, everything we know about rape says that it's done with intent. I don't believe the idea that you can accidentally rape someone. Hyesung didn't get pregnant during that scene- he got pregnant during the scene where he woke Dojin up with a blowjob, straddled him and said "i want a baby". Dojin knotted him instinctually this time, he had never let his pheromone out during any of their past sex scenes, those were all Hyesung's pheromones at play.
Indeed. Poor Heeso even slept outside Dojin's bedroom door, fat lot of good that was though. Both characters aren't the most likable people, we understand why they behave that way, but at the end of the day, rape is rape. Omegaverse logic only stretches so far, and Hye-sung felt he was attacked, Hye-sung's friend calls Dojin a rapist bastard or something to that effect, which prompted him to specify in the contract that Dojin cannot have any physical contact with him. We know the plot is going to show the move from being bonded by omegaverse logic, to having something more sincere and loving, but that doesn't mean we should over look basic common sense when it comes to identifying what is rape.

why are people acting like dojin has been an angel from the start when his attitude towards hyesung has clearly changed ever since he got pregnant and he literally raped hyesung
i don't hate dojin, in fact i like him. i liked his cold personality before he realized he wanted to have hyesung's babies AND his post-pregnancy sweet personality but that wasn't always the case so i don't understand why people are acting as if it was. it's like y'all just want to find more reasons to shit on hyesung for no reason
i understand why people wouldn't like hyesung but some people completely ignore what he's going through and the reason for his personality. he's clearly changing as well and i'm 100% sure that those same hyesung haters who love dojin still won't be satisfied even if hyesung changes to become better in the future