I think Jim missed the point about the whole gamespot controversy, is not because the 9 out of 10. Is because the reviewer said that the game was, and i quote "Politically muddled and profoundly misogynistic" and that why people are so mad against Her review. Instead of making and objective review of the videogame and judged GTAV on both its merits and failings, she took her review and shove her political agenda on it.
She made some valid criticism like "the characters are sometimes inconsistent". but instead of keeping the review like that aka professional, she had to bring up the "Misogynistic", the problem with the whole "Politically muddled and profoundly misogynistic" is that GTAV is a complete satire of the American Culture and especially of the Hollywood culture.
TL DR: People are not mad because the 9/10, they are mad because she shove political agenda in the review to lower the score of the game instead of valid criticism.
Are some idiots overreacting? Of course, is the internet, people overreact to everything on the internet and send death threads all the time about everything. Get used to it because is not going away.