Like, the beta Minjun is an ass hole and all, but the alpha guy Yuri is too, maybe even a ...

Like, the beta Minjun is an ass hole and all, but the alpha guy Yuri is too, maybe even a bit more than the beta.
Yes these 2 are using each other, with a mutual agreement to do so, and yes Yuri's feelings have been hurt by Minjun, but... Yuri is literally manipulating Minjun's gender dysphoria to apease his own father, and puts Minjun in dangerous situations with little thought about the danger he could be put in as a Trans Alpha. such as when he was a victim of a hate crime when the Omega lady attacked him, and even now when the omega dude in heat is about to sexually assault him, and he has no way to escape. I don't know how Yuri will respond this time, but the first incident had Yuri simply go "Oh man, she found out." And that's it.
Yuri is also using Minjun for sex to affirm him of his gender, cause he indetifies as a Omega, and is experiencing gender dysphoria as well.

It is true that Minjun is also using Yuri for sex to affirm his own gender dysphoria, since he identifies as a Alpha, and he does hurt Yuri's feelings by suggesting that he plans to pursue "a real omega" to affirm that he is indeed an Alpha. It is also true though, that Yuri stated he has no intention to stick around, that he was only doing this til his dad 100% thinks he is a straight cis second gendered alpha, and let's him come back home.
At this point, the dad has disowned him, kicked him out of the house, and plans to take him off the will as his heir. Even so Yuri is doing everything to please his transphobic father, even going as far as planning to marry an omega.
Minjun already knows that he likes Yuri now, so he intended to break up with the omega dude, and doesn't want Yuri to meet him because he knows Yuri is looking for an omega to marry to please his dad, even if it means being in the closet, because he puts his dad first before anyone else.
Yes he like Minjun, but pleasing his dad takes priority over him.

So while Yuri is crying that Minjun is considering dating Omega's, he's trying to marry for convenience at the soonest opertunity and leave as soon as his dad let's him back. Yuri isn't thinking of Minjun's feelings, yet wants him to be attached to him, and wants him to be available whenever he wants to be reaffirmed of his gender as a trans omega, even though he has no intentions of continuing this relationship. Minjun is trying to find the omega that will be there as a constant that will also affirm his gender as a trans alpha.

They are both toxic around each other, but it's also Yuri who started this, and is continuing this mess.