In the earlier chapter it was mention that because of whatever happened back in hs caused a lot of peeps involve unable to attend college. And im no korean but being from a similar type of society, and not attending college is like a dooming your future by your own hands , basically your a failure in the eyes of society.
Yesol explained that those guys were already not taking studies seriously, they just wanted someone to blame for their own ignorance, yes the sport gave them hope so they started taking it seriously, but they didnt rlly care about their studies. It was thanks to Yesol and Hanlim that the team somehow worked, but it was also because of their actions that all the stuff that happened between them, um happened

Yesol is so depressed it's not even funny, the dude wants to die he has no passions and like one friend, he didn't gaf when he was getting stalked and honestly he's very obviously passive about his own injuries. I read the SPOILER and i genuinely don't get why Hanlim would do something like that to him. High school baseball is not that deep