She examines the plot devices and patterns most often associated with female characters. She never says the examination of plot devices and patterns most often not associated with female characters is a goal or priority.
She believes the status quo is up to crap and shows us why. And frankly I’m inclined to believe her for the most part. Confirmation bias is a cop-out. She not denying the existence of strong women in games, or well produced representations, what she is doing is exclusively detailing the negative. That is her goal. Tropes Versus Women, analyse those words, specifically the middle one. Just because she doesn’t praise the good it does not mean she is ignorant of it. A bit of research and you’ll discover the opposite is true. She often references Mirror’s Edge and Portal in a positive light.
Is confirmation bias really a cop-out? That seems a perfectly accurate summation of what is being described.
This isn't because I think that women in games are treated completely fine (I don't necessarily think that), but if we're going to talk about how women are "most often" seen in games, by ignoring the opposite scenario, we ignore the possibility that Anita is employing anecdotal evidence.
As a counter-example, say I wanted to make a video showing how men are most often depicted in games. Say I found maybe a hundred depictions of gay men and subsequently claim that men in games are typically depicted as homosexual. But by ignoring the plethora of obviously straight male characters in gaming, I can falsely create the impression that most characters are x when they are really y. Again, that's not to say women have an overall great portrayal in games, but ignoring counter-examples in such a fashion would demonstrate confirmation bias.
It's not a question of how many negative portrayals of women exist in gaming, but how many negative portrayals exist vs. positive portrayals that becomes important.
Regarding her focus on tropes, I think it's dangerous to completely ignore context. I could take Kill Bill and show only the scenes of the bride getting her ass kicked by Bud or shot by Bill and claim it demonstrates violence against women, but in doing so I'd be ignoring maybe the other 98% of the movie which depicts the Bride kicking ass, both men and women.