I think some women are more malicious but I don't get hating ones thst do just want to hang out with men but don't do anything egregious, or that like it for more female centric reasons like cosplay or interpersonal character interactions and fanfic but recognize that they're a part of not the whole of the hobby.They really do underestimate how little women give a shit about nerd culture. At the risk of sounds like Cannibalistic Humanoid Underground Dweller, most women don't give a fuck about a lot of things unless it's popular among men, so that liking it themselves will make them attractive in some capacity (purely survival, find a mate mentality) or at the very least give them a bunch of attention ("Look at me! I'm a rare nerd girl, look at me!") Or, to echo the feelings of my Father and many other Fathers, they hate that it bring us happiness so they seek to destroy anything that will take attention away from them.
I think that's healthier than expecting women to just be your tabletop buddy that you van also fuck or this progressive version which is the same except instead of fucking she pegs you. The hobby branching to have elements that genuinely appeal to women rather than forcing it to be feminine or forcing women to like the male centric elements.
So your gf liking it solely because she's happy whenever you cheer making a good strategic decision like they do with sports where it's about the personal stakes in the players rather than the crunch for most part most of the time, or thinking Macha would be cool to dress as with you also maybe liking that sort of thing. Or she just likes ork speak or maybe can talk lore with you because she likes emo konrad fics