
Because he's frustrated bro, he is offering the love of his life a way out of the abuse and he's saying "no but I'm used to it, I can handle it" when it's hard ASF to watch. Han-gun isn't right for yelling but he isn't wrong for being frustrated and they are young. Han-gun is very clearly at his limit, would you not be exhausted emotionally spending years watching your partner be beaten up just to have them turn down a valid way for it to stop?

Of course he’s frustrated, and they are young and immature. I imagine in the future he will remember these moments and regret screaming…
It’s just I also was very frustrated with his behavior after reading it, I can really relate with the MC, so I was pissed with ML, but I do understand his frustration :/
Why is he screaming to a victim of abuse? It really pisses me off, stop screaming you dumbass, I know you are frustrated but what the hell the last thing your boyfriend needs is more screaming in his life.