You have to remember girls are much more free with each other. If I go to the bathroom with my friends and one of them has to go, she just does it and its no big deal. So I mean probs most of that stuff is just ehh normal like, yeah its gross but its no big deal either.
My expirence with women's restrooms so far has been pretty good compared to the men's. On average they have been pretty damn clean and sanitary and I won't go anywhere that isn't. Although I do live in a higher class, tourist resort area and bad bathrooms will hurt your business big time.