First of all the acting in this drama and the music are awesome. Even the side characters always delivered a perfect performance.

The story on the other hand is pretty bad and the way the story is being told is very one sided.
The directing is sometimes very weird with very strange camera angles.
The time skips are pretty annoying and sometimes its hard to tell when a time skip happened.
The story in itself is pretty disgusting. And there is not a single character to root for.

ML has gotten barely any screentime.
FL is a mysterious person. She has been through a lot and has been a victim to a lot of crimes. A lot of people have been arguing that whatever she does its justified. I disagree but make a picture for yourself.

Overall the show tales too much time to give any useful information so people can paint a bigger picture. After 14 eps the drama is very draggy and boring.