It would be easy to read The Hunger Games purely as premise — twenty-four teenagers, one arena, only one survivor — but Collins uses the spectacle to make a genuinely pointed argument about how entertainment can be used to pacify the people it's built from. Katniss Everdeen is a compelling narrator precisely because she is not a natural rebel; she survives through pragmatism, not ideology, and the series is more interesting for it.
The pacing is relentless once the Games begin, and Collins doesn't flinch from the violence her premise requires, which is part of why the book landed as hard as it did with readers who came in expecting a more sanitized dystopia. The Capitol's aesthetic — excess as a tool of control — is drawn with more satirical bite than the YA label usually gets credit for.
The romantic triangle that dominates the sequels is present here mostly in seed form, and the first book is stronger for keeping it secondary to the survival plot.