Why is this movie so highly praised?

Rating: 4/10 (19 November 2017)

I have to ask, why is this movie so well regarded? I heard nothing but praise from everyone I talked to before watching this movie. So when I sat down to finally watch it I was expecting something pretty decent. What I got was...adequate at its best, and quite insulting at its worst.
Dianna begins the movie incredibly naive. This is fine and perfectly appropriate for someone who has never seen the world. But here's the problem: she never learns anything. Worse than that, her naïveté is encouraged and rewarded at every step. When everyone is telling her not to rush in blindly and she does so anyway, it all works out and she was right all along. All those people were just being callous or cowardly for not rushing in to help every innocent they saw. I don't want to put a spoiler tag so I'll avoid specifics, but I just found this insulting, both to my own intelligence as a viewer and especially to the millions of men who died in the Great War.
Historical accuracy is hardly that important for a superhero movie, so this is not a huge deal, but I have to ask, why General Ludendorff? He's a pretty significant historical figure after the war ends, playing a pretty central role in Hitler's rise to power. Maybe using him was not the smartest move given what they did with him, particularly as it was a completely unnecessary choice.
Apart from Dianna's issues above (basically the entirety of the story) the film itself was...OK. The action was good, the acting was pretty good all around. Gal Gadot did a great job showing a mix of innocence and righteousness. David Thewlis as always was fantastic in his ability to go from utter calm civility to raging intensity in no time flat. Costume design was pretty good, and the soundtrack was awesome.
Bottom line: if you're only watching this movie to see an awesome Wonder Woman kick ass, you'll love it. If you are looking for a story that makes any kind of sense, shows any kind of character growth, and encourages a morality beyond that of a 6-year-old, don't watch this movie.