Actually, I like melodrama (It's what Higuri You lives on, and I adore her manga, and I essentially survived high school through melodramatic romance novels, though I do admit that they also contribute to my being fed up with some of the things that irritate me these days) I just don't like the form it takes in most romantic fiction.

I'd say Shin was the "marriage breaker" in Goong, really. It was originally his plan to eventually divorce Chae-Gyung and marry Hyo-Rin, and he didn't exactly keep it a secret. Didn't advertise it, but they both pretty much knew. But yes, I'd say Goong wanted us to sympathize with Yul. The only ones I could sympathize with were Chae-Gyung, Hyo-Rin, and Shin's mother in that show, though. I kind of hated every male in the show.