I liked the brother's ending in the manhwa compared to the novel.

What happened in the novel?

He had his redemption in the novel. I didn't feel it was fair at all. He married someone else and became the duke and lived happily ever after. People might say due to the mind control of the author he became evil, but even as a kid he was always a manipulative ashore towards the ml
Him getting his happiness in the end didn't sit right with me.
I liked the manhwa where he stayed true to his real nature and stayed obsessive till the end. Made sense