I gave it a 9 because as toxic as it is, I do miss old-school dramas like this where the plot was faced-paced and every episode was packed with things happening. It was fun to watch every episodes. Chemistry was often better in dramas like this, too.

But there are a lot of things to complain about with this drama.
It's very outdated, which is a given ... I can look past that.
It did keep me wanting to binge watch all the way through, but the last 1/3 of the show really dropped the ball with the leads' plot. It's like the writer moved onto different storylines all while ML still secretly pined for her, but didn't do anything about it? I missed the scenes where they were both liking each other still, but FL had pretty much cut him off by then emotionally (understandably so). It became pretty unrealistic and annoying. Like if you still love her, say something ... clear up the confusion ... but no, this drama thrives on misunderstandings.

The whole "conflicted as*hole" trope got really old in this too, it's what made it so toxic. By the last several episodes, 2 members of F4 were now being abusive, calling women stupid and idiots and even offering one's body to someone (???), and a few scenes later supposedly feeling guilty (barely) about how they can't stop being abusive jerks and hurting everyone around them, all while the girl victim continues swooning over him like nothing ever happened.