Toxic feminity is a thing, nowhere near as universal as toxic masculinity but just as shit to be around for a trans woman.
It's the idea that women should behave in certain ways; they're supposed to be catty, snobby, slut shamers, judge others for who they sleep with, fashion-obsessed...
Women don't have to be any of these things if they don't want to. It doesn't make you more or less of a woman. I've met some women who think so though.