Speaking as someone who has read the book, the author has a point. To a certain degree, many of her decisions are negated by the actions of others in the book. What the author doesn't mention is that this is a theme of the book. They live in a very controlled society, undera very strict authoritarian government. They are kidnapped away from their families, forced to perform in costumes provided by others. Manipulated in interviews and by their mentors. Then thrust into an arena where every aspect of the environment can be twisted and changed by the people on the outside to manipulate reactions from the characters.

The loss of female "agency" in the book isn't so much an anti-feminist portrayal. It is an integral theme to the series and it most definitely continues through the other books.

That said, there are times in all three books where Katniss forces her own will into the situation. Volunteering as tribute is the most obvious one that comes to mind for the first book. Choosing to take poison with Peeta at the end is another. She is not allowed to follow through with that for obvious reasons, but she turned the tables on the game makers to force their hands.