All Eyes on Me

I'm very reluctant to characterize Katniss as "unintelligent", though I confess that I haven't read the later books. Certainly in the first book she shows herself to be a competent tactical thinker and whatever win she pulls out of the first Games she does by some fairly abstract thinking. But her intelligence is shaped by her experience, which has mostly been narrowly constrained and focused on daily survival, so once she is out of that environment and situation she is, I would believe, very much out of her depth.