
I understand not wanting to out the MC, and letting him come to his own terms, but I do find it uncomfortable the way they went straight to the BF instead. They basically just demanded confirmation of the MC's sexuality by circumventing him. And whatever test the family put the ML through, I feel that the MC has the right to know since he's at the center of it. The MC is a grown man and the conflict centers around his sexuality and him taking this big next step in life(moving out).
While I get that this MC is supposed to be very 'baby' and thats how the ML and the family treat him, this is the first time this story has actually irritated me with how they dealt with him.

THIS. as if these people are "waiting for jy to come out" because they care. if they were, they would have kept their mouths shut and their curiousity away, let jy do what he want to do, and genuinely waited, but they basically already outed him by confronting his boyfriend. They're just treating him like a dumbass who doesnt deserve to have a say. And this whole secret meeting thing with ch, it IS them deciding for jy what is best for him. If they didnt approve of ch, would they have then forced jy to break up and basically outed him anyway?
Either way, the family and ch's decision to go behind jy's back is crossing a huge boundary.

I honestly think both characters are dealing with this in the best way they can while still trying to be reasonable, so I kinda love them even now.
Kyuho confessed because he wanted that chance of a relationship and now he's only dealing it with it in a fairly realistic manner, where you kinda throw yourself back into your og life but still get emotional every now and then.
One thing ppl that hate on the Seme forget is that from the very beginning, we see that Kyuho and Yoongun have very different outlooks on relationships. Kyuho is much more relaxed about them, and expresses that there isnt a need to take them too seriously. On the other hand, Yoongun is very self aware and acknowledges that he takes them almost too seriously. Thus when he separates from a partner, the relationship sours too far to even salvage. The seme is very aware of how much he cherishes Kyuho, and would rather keep him in his life as a platonic friend than not at all. He's not demanding that they maintain a sexual relationship(like jjk in Jinx).
So the main internal conflict that the seme needs to resolve is being willing to go out on a limb when it comes to relationship, whether its being open to potential heartbreak or its trusting that Kyuho wont completely ditch him either way. If he doesnt, I think Kyuho may still stay in his life but will eventually find other romantic/physical partners and Yoongun would have to be ok with that(which based on the raws, he isnt lol).

I know JJK saying Kim Dan has a defect seems harsh but I actually think this is a GOOD thing in their progress. Up until now, romance has been nowhere near the table because JJK has always viewed Kim Dan as some sort of product/service he transacted for. thats why he'll shell out money when he thinks its worth it, but get really pissed when Kim Dan does anything 'out of line', aka doing something JJK didn't want when he 'bought' Kim Dan(lets face it, their early relationship was truly transactional and besides JJK's aggression, it was otherwise ok).
Now, JJK is experiencing a new side of Kim Dan, particularly his flaws as a person(the defects). His manner of thinking and language is still harsh, but the fact that he sticks around rather than just opting for a new 'product', shows that he's on his way to viewing Kim Dan as an actual person. One with multiple facets, pros and cons, which is important for their relationship to grow.
With that said, Kim Dan almost seems to be moving backwards. He's grown emotionally and physically dependent on others and can't seem to function/survive alone at all. It's worse than how KD started, where he was even more broke and couldn't even spend time with his grandma. Personally, I don't love this backwards development and JJK just doesn't seem the most fit to take this issue on.

I don't think he's emotionally and physically dependent on others. Actually, it's absolutely normal and expected for him to be a mess after hearing his grandma (his only family in the whole entire world) was soon going to die. Plus, Kim Dan loved and appreciated Jaegeng and he was treated like he was pure shit.
Honestly, It's needed to be WAAAY kinder to Kim Dan now. He's sick because anyone with fucking feelings would be. He's a person.
Jaegeng's development is laughable, honestly, he needs to grow up, but I kinda agree with you. But nah, it's not such a big of a development no.

What a well put analysis ヾ(❀╹◡╹)ノ~!
It is something overlooked about Danny. I think him having more time and access to his grandmother is both and blessing and curse. Before, even though he was free to visit his grandmother, it was probably the companion ship of not only Jae but the entire gang! As they welcomed him and celebrated him. Now that he gave all that up, he possibly gotten more dependent (like you said).
Maybe one his journey is find comfort within him or learning that he is beloved beyond his grandmother.
I've no idea, but I do hope realize that he will be fine and that he isn't alone.(▰˘◡˘▰)

As of now, tbh I kinda love the way both parties are handling it. Like yes, he has been acting like someone already in a relationship. But he's also not demanding for it now that Kyuho has laid out his cards. This is a fair and reasonable reaction to someone that needs boundaries. The ML is kinda unique amongst standoff-ish ml's in webtoons. He prioritizes maintaining the relationships he cares about and that's why he doesn't want labels. I think the formality to him means that if the relationship sours, it'll end things much worse than if they just stayed friends.
This is the most realistic reaction i've ever seen in my life. Especially the insistence on being fine, and even the guilt of imposing on your friends.
Personally, I don't think the ML is that bad. He's not being pushy for more when he realizes they're on different pages. He just needs to decide how to reconcile his want for Kyuho with his fear of losing him.
WITH THAT SAID, from my understanding, the ML becomes more emotionally volatile and demanding later. Probably important for him to reach that conclusion.