Yeomin is being called a whore and all sorts of vile stuff by his peers, his friends have turned their backs on him and the man whom he thought was the only person who cared for him has been doing things behind his back and taeseo didn't even properly introduce himself to yeomin so ofc the guy is frustrated and disappointed. It's not abt taking what is offered its abt lying and betraying someone's love and trust
it is about taking what is offered, that's the whole point. The only reason that he had to do those things behind his back was bc he wouldn't accept the help in the first place... paying his debt, taking care of his father, creating a scholarship, etc he did all of that bc yeomin refused the help he was offering. Imagine seeing the person you love hurt and tired all the time by something that you can help resolve and make their life better? I'm not even discussing if it's wrong or right, but in real life this whole plot sounds ridiculous.
The classmate would react the same way even without the scholarship bc he was in a relationship with someone rich and people are cruel... and which friends? he only has classmates, the only friend he has it's the hyung that slept in his house which still treats him the same way

idk why authors like to pretend that someone wouldn't like help with money when they're poor, it's really boring to read this stupid fight. And the poor caracther worried about their abusive family is beyond me, I wouldn't give a fck to what happened to this shitty father smh it must be cultural bc I really don't get it