The recent UFC flyweight title fight between Demetrious Johnson and Joseph Benavidez was booed because the content of the fight itself was not understood by fans and critics of the organization who aren't real fans of MMA.,
In reality, people don't have an opportunity to learn how fighters make moves or change strategies in order to take advantage of an opponent's actions because this is rarely described in fight commentary or articles.
The fact that both fighters must come together to make a fight goes unnoticed as a result. This causes people to not understand that MMA is a game with strategy and diplomacy, and thus they cannot enjoy it for the game itself.
That lack of understanding is the source of this problem.
Big thanks to Robert Sargent (from MMA Rising) for English editing.