Sure, he was and he's not AS bad as the father, especially on the grounds of being very young, but Yeonho is also literally a servant. The power dynamics there are already incredibly toxic. Kyunghee can be ignorant and still be at fault. He may not be a monster exactly but he's definitely a asshole kid who's too concerned with his own feelings to care about what would actually be good for Yeonho, and he's putting Yeonho in a horrible position. I have no love for him.
Yep exactly. He also literally just does whatever he wants and doesn't even attempt to really communicate with the person he supposedly cares for, whether it's to find out what he's actually feeling or let him in on plans that very much involve him. He basically just decided he wants Yeonho but is not mature enough for a regular relationship, let alone one with a victim of ongoing abuse.
Both father and son are different kinds of monsters. They continue to take and take from Yeonho to fulfill their own selfish desires. Taking out their anger on him, blaming him in his powerlessness, engaging in a battle to possess him as if he's an object. The older torments Yeonho and devours his will bit by bit while the younger steps all over Yeonho's fragile sense of being. I can't stand either of them.