I think you'll find it a fine movie. I think Andre the Black Nerd on Youtube said it best when he said the movie was incredibly BALANCED. Diana is wise at times and very stubborn, but also naive in her convictions and she acts on emotional impulses which are tempered by Steve's calm aloof nature. He does'nt cave in to her more outraged moments but he is very tender and respectful of her. The romance is'nt a very big element of it either even if it has to be there for a plotline neccesity, it's very much a buddy film throughout otherwise.
Also, that news about the all-female screenings makes me think the whole point of this movie was lost on some audiences. It does'nt go out of it's way to say males suck or anything, it gives a lot of power back to man and shows respect and equality between the sexes can accomplish greater things at the end. Both Diana and Steve save the day in their own respective ways, with love binding them together.
This also had almost jack all to do with the Synder-verse as a whole. It stands completly alone, there is a scene set in the present where Diana recieves something from Bruce, then we get the rest of the movie, then it ends back in the present with Diana thanking Bruce via e-mail for what he sent. Ben Affleck does'nt appear or anything, you won't be lost at all.
The only flaw is I don't think there should have been a big final battle, it's not as bad as the Doomsday fight, but it still has some hoakey CGI...and I feel there was a great twist before it that could still have worked with how one character resolves a severe threat.