They aren't angry about the score, but rather the faults that she points out in her review. Although there probably are people out there who would get upset over a 9/10 score (actually I'm thinking A LOT).
I don't understand why these people need to get so personally invested with these reviews. It's her opinion and it's true, GTA games are highly misogynistic. If that affected her enjoyment of the game, she has every right to express that in her opinion.