From the way it starts you think it's a crime story but there's nothing like that. Of course as the story progresses we want to know if she is the murderer and that keeps us interested.
You have to watch it and then decide. I also read negative comments, but it's an adaptation of the book, what can you do if the story is like that, it's about Kya's life. I already watched it twice, maybe I'll watch it again.
Greetings.