Do you really need the author to literally spell it to you to understand what is going on?
Juheon os trying to protect Dohu from his fucking "mom". Wasn't it sufficiently clear when Dohu said he crossed paths with her and Juheon literally PANICKED?
Also he is so afraid to suffer again that he prefers to keep Dohu at arms length.
And ALL of that had been shown or said already during this season.
I think Juheon is the exact reason that the author is stretching out the chasing arc because Juheon is not ready for a relationship with all the distrust and unhealthy coping habits he has. That being said i don't think that Juheon is in a position to trust Dohu rn despite knowing Dohu for being so blunt because of how Dohu betrayed him in the past by using him and getting into a relationship with him just for his novel (at least that was the impression he got) and tbh in the chapters when they were together, they never had a serious talk about their emotions, only vague promises. Also he's dealing with shit in his family that doesn't care about him all might keep him occupied emotionally. But Juheon has never been an emotional person, maybe a romantic. So he's just dealing with emotions in unhealthy ways and lashing out at the first person that actually makes Juheon face his own vulnerabilities and problems. Juheon cares for Dohu a lot but he's still hurt and scared that Dohu might use him again or fall victim to his family's ploys and leave him on that basis. I think this season is used to highlight how emotionally inept and broken Juheon is and is no better than Dohu in these things despite seeming calm and rational in the previous seasons. That being said i don't think there will be a chasing arc of Juheon chasing after Dohu because it's redundant and absolutely pointless to add it when Dohu is so adamant about taking care of Juheon. Well I'm fear I might also be taking sides lol

Honestly, the imbalance is throwing me off so bad. Why should the Dohu have to keep pursuing for chapters and chapters, and come off as desperate? Begging for Juheon’s attention?
Dohu has always been blunt. My thing is how much reassurance does Dohu have to give you and in a wording where you believe it to actually believe him?if you really knew who he was and how he is, why are you holding it against Dohu with the way he speaks? It feels like you really don't know him, and you're just holding this over his head for so long. Mind you Dohu never used the notes he got from Juheon and there relationship was pretty brief in my eyes, so it feels like Juheon is going too far.
Also something that bothers me is how internally Juheon knows that Dohu is suffering and says he won't leave him alone, but when face to face with Dohu, he shuts him out and makes Dohu do all the contact, I dont get it.
And that intimacy scene threw me off so bad because he was never like that. You're taking your anger out on him to the point of bleeding, not even apologizing, and we see you and him care more about your injury than his well-being as well? That's not okay. It feels like Juheon is just pushing all his insecurities onto Dohu, using him as a breaking point like, "well, everybody uses me so I'm going to take it out on him". Like, what the fuck?
Even if the author is leading the story to where Dohu stops pursuing and Juheon finally chases after him, I don't feel like it's going to be gratifying. How do you even take back everything you said throughout these chapters? If he needs this much reassuring now, what's going to happen when you guys actually get into a relationship? Are you still going to hold what happened four years ago over his head or move past it? It just doesn't balance out.