You're in no way wrong for this but I'd like to point out that Jinwoo isn't aware of this.
When Guwon explained why he saw him as special, it came off to Jinwoo as a self-centred statement rather than what it actually was: Jinwoo having gained personhood in Guwon's eyes by being different from the others.
Jinwoo didn't understand that him being different from the others was why Guwon liked him in the first place.
And you're right about him not thinking straight. He's overwhelmed with grief and confusion and he's trying to prevent himself from getting involved as to save everyone. But he's doing so w/o understanding what made Guwon actually like him and isn't even rlly taking it into consideration. He's just trying to remove himself from the narrative bc he recognises himself as the one who tipped over all the dominoes.
Teach still hasn’t learned a thing. Seriously, doesn’t he remember how Guwon loved that he was different from everyone else? The fact that he stood up to him and called out his ways as wrong, basically showing he wasn’t just cattle like the rest of them made Guwon see him as a 'person'. Now Guwon’s taken an interest in him… well, great for the plot, lol.
And dying won’t help anyone. This is so frustrating. I know the shock of everything that happened must be huge, but he’s not thinking clearly. Hopefully he’ll get some time to rethink his approach this time when Guwon saves him and takes him back to town again.