in my logic, you feel more free to get angry to peope close to you, and juhyeok feel closer to su-ah, hence why juhyeok is freely letting his emotion with su-ah.
I believe juhyok has pride issue too with su-ah, remember as a child he was sure he will be an alpha, and protect su-ah, but now the role reversed, and add to the fact su-ah is the reason he has a hard time managing his pheromones (altho unintentionally), so imagine the annoyance he felt with su-ah, he still likes su-ah but he is prideful and su-ah is shameless, so he reject su-ah more vehemently
to me, that's another point towards concluding that the character writing in this series is shallow and insubstantial, despite the potential it holds, along with how juhyeok is suddenly okay with suah despite everything after some time apart. you can make some assumptions and inferences about juhyeok and his feelings towards and about suah based on what has been shown (he's tsundere, has negative/contradictory self-image, was raised in an alpha chauvinist kind of way and so on), but nothing that really connects to how he expresses himself and his actions towards suah apart from the obvious, and even less to explain how his attitude and actions towards suah have changed in recent chapters.
I'd love to be set straight and proven wrong, but I'm not feeling confident with this creator's track record and evident story priorities (smut over everything).
am i the only one who thinks the relationship between the business guy and juhyeok is being written a little weirdly??? like it'll come into play later on in the future again? bc mc is kind of treating him weirdly nice despite their each encounter being him wanting to have sex with him; he nearly sexually assaulted him in that alleyway, he DID sexually assault him when he was drunk and they were kissing + about to fuck, and he's constantly harassing him with the "baby" talk, making lewd suggestion, etc etc, but when it comes to su-ah?
of course, su-ah has raped him (multiple times might i add) and scent marked, but he treated him like that BEFORE any of those events even happened/he realized. his only crime before that was possibly scenting him as a child, where it was probably unintentional or innocently thought (i do understand su-ah followed him around everywhere, but that was relatively harmless every time it showed, too). but when its the TJ, taejee, whatever his name is guy, he's just... mellowed out? he doesn't seem like the type of guy to only treat su-ah like this, it feels like he would be disdainful towards any alpha who would constantly try to claim they're "dating" or lie saying they had sex, but nothing happens towards the other guy. (he did use a martial arts move on him but his first thought was "he's a normal person!", meanwhile su-ah, he's just fine doing it to him)
idk am i crazy someone educate me i don't really get it unless they're intending on using his character for something more angsty, waiting to set him up with another person, or it's just juhyeok getting more flustered around su-ah for mate/scent reasons or some crap (probably the case)