The extra star is for an ending to a saga and those few parts of the book that are a little entretaining.
The MC spends half de book crying about this and that. The author gives him grief that does not develop the story and simply slows the story more.
The saga was good turning to entretaining, ending… Concentrating only on the MC’s love interests.
Weak.
This book has put me off from re-reading the saga now that all books are out.