I enjoyed reading the first two books, but, the third one I was trying my hardest to like it. I feel the ending was strange only because there were a few things that happens that made no sense. Katniss almosts seems to have a different personality in this book from the others. I would say from Chapter 20 to the end is when I was finding myself no longer liking the book. 

Question: How it's the ending?
Answer: the end is when