but don't let who she is get in the way of the message she's trying to convey to people
What's her message? Every study shows that violent video games don't make people violent and sexist video games don't make people sexist.
http://www.theguardian.com/technology/2014/apr/12/ethical-video-gaming-games-for-change-festival
Video games are safe outlets and safe spaces to explore our human nature and and do so in a fun manner, whatever violence or sexism a person playing games exhibits was not fostered by playing those game.
Also her message would be better served if her criticism wasn't skin deep, something you could come up with by watching a 15 minute video of a game. To me it seems like she doesn't understand gaming, that the exercise of playing a game is fundamentally different than watching a movie, that a game is not complete without the actions of the gamer and that whatever she perceives while gaming is not the same what someone else perceives and does while gaming. I doubt that she actually plays the games she criticises, as those criticism seem entirely to be from someone who only watches games and not plays them.
Just look at her newest criticism of the Witcher 3, anyone playing the Witcher 3 knows that the game exhibits the whole range of human experience and that it goes out of it's way to make even secondary characters matter and not just window dressing and that the most powerful characters women and the ultimate hero in the game isn't even you, but your foster daughter. Which other game does that and doesn't make the actual main character of the game into the ultimate hero who saves the day? You have to ignore pretty much everything else and purely look at the instances where finally a woman is the victim and not a man to come to the conclusion that Witcher 3 is unfavorable or sexist in it's depiction of women