I hard checked out when she made the criticism that it was sexist to depict sex workers in games, rather than criticise specific instances of these depictions. In general I found a lot of her perspectives to be pretty outdated and conservative, even if there's a gem of truth to her arguements. I guess it set out to be a beginner's guide to feminist criticism, and it kind of achieved that, but it was remarkably shallow in some areas.
Obviously there were a lot of idiots attacking her right to engage in this kind of criticism, which was awful. I just found the criticism lacking, so I stopped engaging with it.
I'm pretty sure this video's argument was rooted in the fact that female depictions are scarce to begin with, so it's a problem when the few women who appear are linked inextricably to their sexuality. It's part of a greater criticism that women are often depicted specifically as to how their sexuality relates to other men in the story or an assumed male player.
But based on your post, I think you're actually more upset she upheld the stigma surrounding sexwork. I don't think it's fair to "hard check out" over that because that's not something all feminists agree on. There are many feminists who believe consent cannot exist as a product of coercion and that sexwork commodifies women. They believe it divorces women from their own sexuality by classifying it as a product for masculine consumption.
There is, of course, the counter-point that sexwork is not inherently sexist. Other people believe the circumstances surrounding women in sextrades - namely how they are treated - are the actual misogynist construct. There is an argument to be made about laws that protect women rather than condemn them and that it is unethical to try to regulate whether a woman chooses to have sex commercially or not.
But these are extremely nuanced and complex conversations and most definitely do not facilitate binary opinions. Whether you believe in a world without sexwork or a world with idealized sexwork, there are lots of ways in between people may still agree or disagree.
You are doing yourself and others a great disservice when you shut down and disengage from other feminists over something as complicated as this. Somebody's opinions on sexwork is a very poor litmus test for whether or not they're "old fashioned."
I hope it's clear I am well-intentioned and don't mean to drag you for post. Being a feminist is a non-negotiable yes or no, but this is rarely true with actual feminist issues. You could have taken issue with her comments on sexwork but agreed wholeheartedly with much else she put forth - or at least found the perspective valuable.
I'm one of the uncommon gamers who knew who Anita Sarkeesian was before GamerGate. I watched some of her videos on film when that was her forté and definitely didn't agree with everything she said. I remember her saying Silence of the Lambs wasn't feminist because people only remember it as a movie about Hannibal Lecter and thinking it was a totally moronic rationale. It is okay to disagree with people on certain things while still finding great value in their greater point of view, you know?
I hope you might eventually give some of her other videos a shot. The fact they are contained by topics makes it easy to separate the things you agree with and the things you don't.
Final edit: I apologize if this is a rough read. I'm typing this on my phone between customers at work and it always kills my flow.