I mean, as a woman, my perception of it is different from yours. Not trying to say that my poInt of view is better or more important, so sorry if this comes off that way. But I've experienced things that make this a bigger issue for me than it may be for you. It doesn't mean you're wrong, just that we're on different sides of the issue. If that makes sense.
It's more than it just being an issue of "2/3 of the women in Westeros are in positions of authority"; there are a lot of societal and cultural issues lying underneath it all that I don't agree with, and Sansa's treatment deals with a lot of them.
A piece of entertainment or media being set in a historical or historically-based time period which we now perceive had a lot of misogyny does not make the entertainment/media inherently misogynistic, no matter your personal views.