I'd say this deserves a 10 purely for SYJ who could not possibly have done a better job.

I understand that a lot of people were disappointed with the ending, but it felt so very fitting to me. This drama shows us the consequences of actions that most tend to ignore, usually wrapping everything meatly in a bow and a happy ending that sometimes doesn't even make sense, throwing aside collateral damage as though it never happened - but contrary to what people would expect, revenge would in reality rarely end well. Regardless of intentions, revenge is a selfish motive and will always, always, result in unfortunate outcomes, though the scale of misfortune may vary depending on action taken - so this drama tries to tell, and at least for me it came across as intended.

As far as consequences go, the end to their relationship was all the more fitting - because from the very first scene, it was a foregone conclusion. No amount of love would be able to overcome the things they did to each other, both directly and indirectly by being a by stander while the other suffered, so when I found myself rooting for them despite knowing logically that it made no sense, I arrived at the conclusion the only way it could have ended is the way it did. That said, every moment felt like an "in another life" one, and seeing the very last shot reflecting my feelings was satisfying in an unexpected way - because in spite of everything they made me root for them.

Did the ending suck? Hell no. Would I ever re-watch it? HELL no. There's the dilemma that I can't quite resolve.

(As a side note, even though SYP was a boringly straight forward character compared to every one else, what with his horribly accurate moral compass, I still had a huuuge case of Second ML syndrome. I wish he got a not so open, more hopeful, happier ending, but since I don't want him to end up with Rael, I'm a bit lost. Another dilemma.)