I feel far more judged by women for not 'following the rules'.
Me too. I tend to have a friendship group that's split 60:40 males:females. Mostly because I work in academia which is still fairly male dominated and my hobby is sailing - which used to be more male do,inmates but not so much now.
I have encountered sexism from men; but some of the worst, narrow minded comments have come from women.
It took me a long time to have a child, I'd had cancer treatment in my early 20's so had assumed I was infertile. In those years before my eldest was born i was frequently dismissed by women as not a real woman, not understanding anything. I was judged, pitied and encountered prejudice over holidays etc because I was a woman without a child. My male friends never encountered this from women. And my male friends didn't treat me differently on the basis of not having a functional reproductive system.
I also saw that attitude displayed towards other childless women and, worse, single women automatically treated as if they were out to steal partners and husbands. Again, not seen in my male friends.
Now I have children I am still not accepted by many women because my Dh is a sahp and I work ft and am often abroad. So, basically even after i ticked the marriage and babies boxes there are still some women who want to criticise and judge me. That stinks.