
Remember, people who are tortured by guilt are easily manipulated.
Derek is the way he is now because he is trying to make up for losing Yvonne or evening going to the market in the first place, in his mind its easier to blame the "Villainess" than face his own guilt and thus falling deeper into the brainwashing pit making it harder to fight back even if he wants to.
Still though you can't help but feel a bit of resentment towards him.

Alright anyone who has read the novel spoil it for me, how is the ending? is it any different? And how so. Still weirded out by how Yato is disguised as a human using her father's body but overall not mad she ended up with Yato i'm just sad how miserable this ending is for Ja Hyun

The spoiler of ending: Jahyeon, who was drunk, saw from the bar's window that a beautiful couple is there, the man hugs the woman and the woman smiles beautifully for him. By the time the went into carriage and it moved, Jahyeon realised who was it and ran from the shop tailing the carriage screaming Soru! Soru!, he dare not to take off his eyes from it. In desperation he stole a horse and chased it, it went towards the mountain and he ran through the forest where he saw two people ascending towards the sunset. He started calling out again Soru! Soru! but his voice didn't reached them even though it was loud and clear. His heart sank and he realised he can never forget her and is doomed to live his whole live in her remeberance. As he left the forest with slumped shoulders he hear the song of the Goblins

That’s the part near the ending tho! :>
Source: https://m.fanfiction.net/s/14019658/1/Heeran-love-song
You can scroll all the way to bottom! The ML and FL were still at the mountain setting. It’s slightly better, in my opinion, since the novel has some details that were probably not fully brought over for the drawing entirely. But the scene and moment were pretty much the same
Now now Riftan lets actually communicate this time instead of getting jealous and angry (⊙…⊙ ) ngl kinda scared though
Fr has me stressing