Midnight at Malabar House

Two and a half stars? I really disliked it. We follow a thoroughly unlikeable protagonist, who throughout the whole book doesn't seem to care about another human being as she fumbles through a murder investigation. As we follow her, we gain access to to her thought, which include such pearls as ‘colonialism- bad', ‘women can be police officers', and my favorite ‘poor people shouldn't have children'
Oh, and the last 50 pages is the author explaining the events of the book like 3 times
I really don't understand the rating