Let me preference this by saying I'm a swiftie.
But you can't jump to conclusions based on just what she said.
Yes. The joke is misogynistic and old. But also, the joke was there for a REASON. Watch the show and you'll see why. The show is amazing, it highlights the struggles of being a teen. It's cringey at times but to be honest it's actually modern and brings up issues other shows doesn't. If you don't like Ginny, Georgia's storyline is amazing and is worth sticking around for.