Their entire victim complex requires them to believe that no matter what, they are the underdog constantly fighting an uphill battle against insurmountable odds or evil misogynists in all powerful positions in society everywhere. Also they have to constantly push the narrative that women only got the vote and the ability to enter the job force about 15-20 years ago.
If they ever admit they "won" any kind of a victory then their whole victim narrative falls apart. Why else do you think they were begging for people to see Ghostbusters, or else all little girls everywhere will be forced to live in a world with no female heroes whatsoever. Like that is the first, last, and only movie with a female protagonist and if it did not succeed, then that would be the end of female protagonists everywhere forever and ever.