
I get what you mean. I’ve been really interested in the same thing trying to trace how Mincheol went from the sweet, hardworking guy he was in the past to the broken, desperate man we see now.
I don’t excuse the way he hurt Hae-soo cheating and debt are unforgivable but for me, it feels like he changed because his life and dreams literally collapsed around him. He wanted a family, and losing that seems to have shattered him.

Respectfully, anybody with basic common sense regardless of their education can see that men are cheaters, lustful and manipulative.
You don't need to dig into the psyche of men like Mincheol to know that the majority of men are shit.
Poverty turned him crazy and like any man, he blames haesoo to this day.
Good luck with your studies
the person who said about them being curious as to why did mincheol changed for the way he is now, same question actually.
i know most of y’all HATE mincheol to the guts. but i’m really curious when did he start changing and when did his love for hae-soo turns sour.
because the “before” mincheol would for sure raise an eyebrow on how he’s treating hae-soo.
i mean, the mere fact he used his wife’s name to borrow from loan sharks is already telling A LOT of things. but when did he started to be complacent and started hating hae-soo to the point of hurting the very person he dedicated his youth with?