I don't think Sungho is a terrible character/person. Yes he is kind of a weak and easily influenced person but I literally know people who act like Sungho and his dad irl. I don't think Sungho hates Duk-Gwang because of the possible criminal charges. I think he knew the only way to keep Duk-Gwang from the fate of prison was to use his father’s power. When you look at it like that, Sungho literally used/manipulated his father to save Duk-Gwang at the price of his own happiness. I think Sungho is treating Duk-Gwang like he is because he has to isolate from him and it's easier to convince yourself you don't love a person than face the reality of never being able to be with them. I think Sungho is a very selfless person sacrificing his lifelong happiness for Duk-Gwang's freedom
I don't think Sungho is a terrible character/person. Yes he is kind of a weak and easily influenced person but I literally know people who act like Sungho and his dad irl. I don't think Sungho hates Duk-Gwang because of the possible criminal charges. I think he knew the only way to keep Duk-Gwang from the fate of prison was to use his father’s power. When you look at it like that, Sungho literally used/manipulated his father to save Duk-Gwang at the price of his own happiness. I think Sungho is treating Duk-Gwang like he is because he has to isolate from him and it's easier to convince yourself you don't love a person than face the reality of never being able to be with them. I think Sungho is a very selfless person sacrificing his lifelong happiness for Duk-Gwang's freedom