
female supremacy is not feminism
In technical terms, female supremacy is feminism, just as masculism is male supremacy. It may not be exactly 'supremacy,' but more like preference or social definition. It's a fight for rights. However, when you pick a side in the genders' fight, you are advocating for that specific gender, and are therefore establishing superiority.
Female supremacy isn't always "Females are better than males, boys suck and are all misogynistic and pigs and stuff" you know. That's your distorted view that gets established when you read through feminist twitter.