Sailor Moon was pretty important for it's time and the idea is pretty good and all ..... but Usagi is a dumb egoistic girl who only wants to get thin and be protected by tuxedo mask
She is like the WORST role model for a feminist ever.
Usagi is a young woman who has the fate of the world thrust upon her and grows as she gradually takes up this responsibility. Of course she doesn't react well at first. Of course she's scared and uncertain. However, she's also good natured and, more importantly, cares little for social norms and expectations. She does her own thing in her own way. This is precisely why she's able to be the focal point of her group of friends that would otherwise be outcasts, and also why she's somewhat tomboyish from a Japanese perspective.
The whole getting thin bit was one episode, and the show goes around having fun with different fads, of which all turn out to be evil, obviously. As for Tuxedo Mask, the ultimate irony is that while Usagi does find him terribly attractive, he's undependable and most of the time completely useless. He doesn't actually DO much of anything most of the time! Usagi has to do all the actual heavy lifting, and just needs a bit of help or encouragement in doing so.
Most of all, though, Usagi is also the comic lead of the show as well as the dramatic lead. None of the show works without her, and bashing her as you have shows how little you pay attention.