I feel like a lot of people are complaining about her breaking up with her boyfriend. If you've watched Jane the Virgin (the series that this drama is based off of) then you'll know that that's just how the story goes.
It gets better, well at least in Jane the Virgin, this one is still one episode 8 so I can't really tell if they're gonna follow the same storyline.
Plus the whole concept of Jane the Virgin was to imitate cliche plots in telenovelas. So watch this k-drama with the thought of them mocking telenovela/k-drama plots. It's not meant to be taken seriously!!