Pretty sure his mom has a serious mental illness. Combining the genetic disposition (nature) with the abuse (nurture) increases the risk of developing serious mental illnesses a whole lot. It's no wonder Sangwoo grew up into the man he is, since he grew up in such a toxic environment. That's no excuse for hurting and killing people, of course, but his behavior makes sense given his upbringing. He would've been better off if he had received professional help early on.
Pretty sure his mom has a serious mental illness. Combining the genetic disposition (nature) with the abuse (nurture) increases the risk of developing serious mental illnesses a whole lot. It's no wonder Sangwoo grew up into the man he is, since he grew up in such a toxic environment. That's no excuse for hurting and killing people, of course, but his behavior makes sense given his upbringing. He would've been better off if he had received professional help early on.