Why is "female" a degrading term?

⭐️MerFerret⭐️ • 👼🏼👼🏼👼🏼 • Beagle mama • Lupus & Fibro • 🏳️‍🌈 bi
I see on here a lot when ladies think someone is doing something bad/disgusting/they're-mad-at-them, and in real life I've also noticed it spat like poison at other women... They use the term female instead of "woman" "lady" "girl"... I mean it's just the technical term, I don't get how it's an insult? Yes I am female, how is that bad?
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Sorry if it's dumb, I just don't get it lol!