It is honestly hard to say. I find it kind of pointless to even go through and criticize it, because it simply isn't made to be criticized. Its not made for a discussion. She didn't want to have one at all. Not once did she ever engage in public debate. Because the whole thing wasn't meant to operate that way.
This is why I didn't immediately come out of the gate hating her because I thought she did want to have a discussion, it also wasn't at all clear to me that her belief was "sexy = sexist" because I never imagined someone could really be so tight assed, it was an alien concept to me and took some time to grasp.
Very quickly though when it became clear that there was no discussion to be had, you either agreed with everything she said or you were labeled a sexist and that her analysis really did just boil down to "anytime a woman is depicted as attractive, that's sexist" I grew to hate her fast.
What really pisses me off though is that while the grift may be over for her there was nevertheless permanent damage done to gaming and gaming culture, sexy women were 100% stripped out of any game not developed in Eastern Europe or Japan and gaming culture was permanently fractured in two.
I like to think maybe it's not all directly her fault and maybe it was just the zeitgeist, ie if it hadn't been Sarkeesian it would have been someone else, because the thought of one single person doing permanent damage to gaming makes me too angry to really think about too much.
To be fair I do think the zeitgeist would have turned either way, but Sarkeesian and Quinn only made things that much worse by being such focal points for the conflict.