Wow good question actually I don't think the answer is clear yet?
Maybe shin feels like he can finally get out of this muck bc he knows our Eminem isn't actually a gangster who could kill him and he feels like now's the time to wash his hands off? Eminem also wrecked his normal life
Frustration from being lied to?
Or maybe combination of all as he mentioned "the only way to get rid of the pain is to get rid of the source"
It's not that Shin is mad at Jake because he's not a gangster, I think he's pissed that Jake never told him anything real about himself. Shin had to guess on everything he knows about him, then he finds out that everything he pieced together wasn't even real. They're literally living together and Shin had no idea what his actual job was - and Jake never did anything but ordered him around. If you think about that it's really selfish of Jake. I feel ya Shin ╥﹏╥
I don't understand, Shin be blaming Jake because he's not actually the gangster he thought he was ? Maybe I didn't read well but it doesn't really make sense to me or someone can explain me ?