@yopy the response you got on that chapter from another user already pretty much says it all, but the general gist is; one, having some characteristics typically seen in ppl with a mental disorder doesn't mean you have the disorder too. two, mental disorders aren't diseases, neurodivergent ppl just tick differently. third, while you personally may be neurotypical and identify with Sangwoo a lot of neurodivergent ppl, especially those on the autism sepctrum feel very reminded of their own 'oddities', difficulties they have that Sangwoo has too etc. I can't speak for everyone, but that was how i felt like when i first started reading, and i've seen other nd people voice similar opinions. also, some of his reactions don't seem like they can be explained by just being angry, and some of his reactions to having his routines disturbed aren't logical at all, but again, the other user already said all of that better than i could.
I am not saying your opinion isn't valid, it's fiction, at the end of the day everyone who reads it is going to interpret it and connect with the characters according to their own life and personalities, i guess what i'm trying to say is just, keep an open mind?