The overall story, acting, music are all good but the drama feels to be missing something. Sometimes it becomes too slow and other times it becomes too fast.

The thing that annoys me the most is how the "villain" did not get any repercussions for his stupidity and generations of torture to the FL's family. Is there no higher supernatural being watching over how these other supernaturals are behaving?

It would've been a much better drama if it was short, maybe 5 - 6 hours mini drama or a movie.
It would've been a re-watch worthy drama if it was a wholesome story of two people falling in live and helping each other get over their curse/trauma without including the revenge plot of the supernatural being and the past life connections.