When I saw this anime, the first feeling I got was that the monsters were very underworld, they caused panic at the mere sight of them and fed on children as if they were cattle.
Then when they unveiled the part where the monsters are good, have children and family and live as people of low social status, the anime was ruined. Since it removed the intrigue of the infernal and the gore and became a series without violence.
To the point that no child dies in the journey, so the only thing that one expected was to see how the heroine lost friends one after another, but not even that happened.
The series became family friendly and was ruined.