Loved the comic, end pissed me off

Seriously cant with the ending, don't get me wrong, I was rooting for Seo-woo, the fact that the comic makes him out to be this shy timid person who builds up the confidence to woo his lover in a fit of jealousy and love is beautiful! The problem I have is the fact that in the ending he becomes basically the same as his brother, someone who Seo-woo wanted to be SEPERATED from entirely as a person. I'd rather Jae and Seo end up with the MC rather than the ending we got.