You are quite correct, it would be hard to "prove" what peoples motivations are for criticizing a game, and yet you feel you can confidently lable pin it on misogyny.
But tell me, if people ought to listen to your assertion that misogyny is obviously the reason because you feel really confident about that, why should they not then listen to the next person who feels so confident about something it doesn't need to be backed up? See the problem? You are straight forwardly suggesting that people should just be gullible and go with whatever they hear. Now if you really believe there are lots of gamer misogynists out there, would you not want people to be a bit vigilant about what claims and ideas they take on board? I mean what if someone ends up talking to more dastardly misogynists than righteous feminists, then they too would end up dastardly misogynists.
Or people could... You know, apply some critical thinking, and not just believe any claim presented without evidence.
But it would be interesting to hear if you think gamers have just recently become sexist pigs who hate women in games, because I seem to remember beloved games with women stretching back decades, and before that for an even longer time movies with female protagonists and heroes, without people hating them for that fact.
Lets have a look at a recent example. The blowback for the new Ghostbusters movie was labled by a lot of people as misogyny, but that would make the new Star Wars movie hard to explain. If people just hate seeing female leads, why would it not affect both movies equally? Could it be that it was something else about one of those movie that people didn't like, but a lot of feminist minded people really love to spin the narrative of misogyny and patriarchy around everything they do?
Gamers don't hate women, movie fans don't hate women, in fact the narrative that women have been historically hated is incredibly ignorant of any context.