He literally does not know the kid, sure you can feel bad for a total stranger who went through shit and suicidal but to literally live that kid's life is a whole different thing. If taekin died in front of the truck he will have to bear the consequences and now he isn't dead, he still have to bear with taekin's life. As a reader, I definitely feel bad and its awful to see him suffering with mental illness to the point he was ready to end it all. At the same time, I also understand why MC thinks that way about the high school kid. Plus he's only slowly learning about the kid's life, there's more to him and we haven't learn a lot yet so it will take time for the MC to start learning and understanding the kid.
He literally does not know the kid, sure you can feel bad for a total stranger who went through shit and suicidal but to literally live that kid's life is a whole different thing. If taekin died in front of the truck he will have to bear the consequences and now he isn't dead, he still have to bear with taekin's life. As a reader, I definitely feel bad and its awful to see him suffering with mental illness to the point he was ready to end it all. At the same time, I also understand why MC thinks that way about the high school kid. Plus he's only slowly learning about the kid's life, there's more to him and we haven't learn a lot yet so it will take time for the MC to start learning and understanding the kid.