This is one of those dramas with unlikable main characters.

The ML in particular is a special kind of selfish and manipulative piece of shit. The FL also has her issues, but is at least someone you can sympathize with. She at least tries to end their miserable relationship. But he of course won't allow it.

They both need therapy. That people close to either of them fail to recognize and suggest it is dumbfounding.

About halfway in, I skipped to the end, didn't see myself making it through the other half of the episodes. And the writers unfortunately, or expectedly, went for the "romantic" ending, yikes. I think the much better ending would have been for the main characters, especially the ML, to recognize their issues and go separate ways.

If you look for something to hate-watch, go for it.