Episode 14 gives you more clarity on it, do watch ;) The answer is as it should be, somewhere in between. It is…
Sorry but I don’t feel that I need to put a spoiler tag this time to say that he is a scumbag. Being raised in a a home where he and his family were abused by his alcoholic father and to see how he kill his mom, give him the right to do what he is doing. He almost killed his brother at the hospital, he almost killed DJ, he erased the evidence of the accident, he left TH’s dying on the street when he was the one who hit him with the truck instead of helping him. So he truly is a scumbag
https://kisskh.me/Drama/The-Letter-from-the-Cloud/Episode-13?id=6682&ep=114198&page=0&pageSize=100