Something all these comments are missing is that we live in an altered timeline. In the OG, Jinhyun wasn't number 1, which meant that Sangnim likely was and was able to use that fact to get back at his father. In this timeline, he doesn't have that as an outlet, which is a major contributing factor to him going psycho.
Jinhyun is inadvertently and unknowingly destroying a lot of lives due to his selfish desires for this timeline - and we're swiftly building up to where that will all come to a head. Keep in mind, after all, that the entire reason Jinhyun got this second chance was for saving an angel(?), which he isn't on track to doing in his current state.
Jinhyun is inadvertently and unknowingly destroying a lot of lives due to his selfish desires for this timeline - and we're swiftly building up to where that will all come to a head. Keep in mind, after all, that the entire reason Jinhyun got this second chance was for saving an angel(?), which he isn't on track to doing in his current state.