This show really isn't as bad as people are saying.

From the acting to the storyline, I'm enjoying it quite a lot. I like the female lead for her intelligence, and love Do Jin's character for his kindness.
Also, I expected to feel frustrated with the female lead for keeping things to herself or making poor decisions, but it wasn't as bothersome as I thought.
Oh, and the villains— the villains are both intriguing and detestable. I can't wait to see where this storyline takes us next!

Edit: Now that I finished this drama I have to add some things that I didn't like.
The ending was a bit to open for me. I wished we could've seen the trial of the villains and maybe some more story for Do Jin. But it was fine.
Also some dumb decision werde made. It was the smaller details. For example: turning your back to the "enemy" to call someone or letting your child roam free outside while the villain is planing to hurt it. Annoyed me but it's bearable.

I just suggest you to watch it and then decide for yourself whether you want to continue or not.