So, Chinese dramas are notoriously long. They tend to spread out over many more episodes than they need to, with some episodes being no more than filler. That's a big complaint of mine. However, that said, if I have to fast forward through a lot of stuff to get to the meat of the story, I will do so. I might rate lower because of all my wasted time, but not always. There were a few things in this show that I found problematic and ultimately unforgivable.

Wasted time/scenes/episodes
No chemistry between leads
Leaving for no apparent reason for years. I find this trope so maddening, because in this day and age, with everyone walking around with a phone in their hand, that someone could leave for five years is just irritating. First, them not having contact with one another for years completely negates all the stuff we had to watch to get them together. If you can leave without a word, you aren't really in love.
But the biggest thing for me - you have a child with this man and don't tell him?!?! That is unforgivable! I'll admit that the prudish side of me started watching Asian dramas because they were more pure than American TV. I got tired of the going to bed with one another without a commitment. Sadly, so many Asian dramas are jumping on the premarital sex bandwagon. I can deal with that, but there is absolutely no excuse for keeping a child from his father and vice versa. That was the kiss of death for me, as far as this drama was concerned.