The film didn't need to explain why she turned her back on mankind and their affairs after World War 1 because she didn't do so.
People made assumptions about the meaning of her statement to Bruce at Clark's funeral, assumptions that this film dispelled.
You're assuming a consistency of plotting from a studio that just last year hired a freakin'
trailer company to re-edit Suicide Squad, and which had no idea while making
Man of Steel that Gotham and Metropolis practically adjoin each other.

I find it
much more plausible that the movie's happy, pretty-sunset coda was a reshoot to send the audience out on an upbeat note, rather than the downbeat and narratively consistent one they'd originally intended. Or maybe it wasn't a reshoot at all, and Jenkins was ignoring that clear implication of
BvS from the start. Either way, I'm about zero percent convinced that Snyder
didn't mean for Diana to have turned her back on humanity in general when he made
BvS.
The one present day bias (from the producers or writers) creeping its way into the film was Trevor mentioning going before a judge as part of marriage process, when it can be easily argued the majority of marriages during the WW1 era (particularly for Americans--Steve's POV/rearing) were officiated by a religious figure, whether in a house of worship or elsewhere.
Oh, I promise that wasn't even remotely the only thing.
Shall we recap certain things in this movie that make
no damn sense?
- Why is Diana said to be at "school" if she's the only child? Wouldn't it just be "tutoring", then? And when was she born? Given that the rest of the women are apparently immortal, why are some women about adult Diana's age while others are older? Was she a child for centuries?
- Where has Zeus been this whole time? Is he still alive? How was Ares able to kill
all the gods except him? And why does he want to destroy humanity when he's the God of War who, y'know, loves war and warriors (see: Homer)? He's not the classical Ares at all, but instead a mix of Satan and Ultron, I guess?
- Why was the German ship listing/sinking? If it ran aground/hit a rock, what happened to its crew? Also, how was a ship only minutes behind a biplane? And why the day/night change? Is Themiscryra merely cloaked, is it cloaked
and impenetrable, or can it only be entered sometimes? Was it penetrable because Diana did her bracelets shockwave? If so... why?
- Why was an unknown person allowed into a War Cabinet meeting? Does the concept of security not exist in wartime Britain, decades after Lincoln's assassination? And why is an American spy reporting directly to the top generals? Even Cap didn't report directly to Ike or Patton, so where was Trevor's chain of command? And, when asked why he had to go back to London, wouldn't an Army officer mention his duty, rather than shrug, hem, and haw?
- Why doesn't Diana know what marriage is? It isn't some modern concept. The Greek
gods married, never mind the ancient and mythical Greeks. Are
none of the Amazon married? Did the twelve volumes of the made-up erotic writer never mention the concept? Also, it's 2017. Not even a
hint of a mention of Amazonian woman-on-woman action? Has Diana fooled around with any of her peers? Speaking of which, did
none of them want to accompany, protect, and fight alongside their princess?
- Given that Trevor was an American officer who knew how to sail, he was probably well-educated, and almost certainly Christian-raised, if not Christian himself. So, does he really not ask
any questions about this whole Olympian gods situation? Does he even
gently ask if she's so much as
heard of Jehovah, the Jews, Christ, Islam, all that stuff? Also, Themiscrya must be in the Mediterranean, if it can be reached by a biplane flown from an Ottoman base. Ergo, it's days/weeks of sailing to London, during which Diana would absolutely have seen land at the Strait of Gibraltar even if nowhere else, and should have grilled him on geography. And, why do they take the Thames into London rather than disembark somewhere around Cornwall, and hop a train? (London connects to the English Strait to the East, and they'd be sailing from the Gibraltar/the West.)
- I'm pretty sure "Ottoman" isn't a language. Shouldn't Diana have identified it as Turkish? It's not as though she seemed to know what the Ottoman Empire was. And, of all those languages she's studied, how has she missed all the words relating to marriage?
- Why is Diana so blase about fighting and killing once she's got actual blood on her hands? Cap grew up in the real world, being bullied and getting in fights, so he at least had some idea of what he was getting into. Diana learns that Americans are very much capable of savagery towards Chief's people, but without question attacks the German lines? And, if that part of the Front hadn't moved in years, as implied, than how did the Belgian refugees cross No Man's Land/what was with the implication the town had only recently been invaded? Hadn't it been in Central Powers hands for years at that point? And wouldn't Diana have wanted to tend to the wounded from the charge she led rather than socialize? Why do we not get one meaningful conversation between her and a non-Amazonian woman? (No, the Candy banter didn't qualify.)
- Why the hell was Trevor not clean-shaven at the party? Way to blow
any semblance of a cover, dude.
-
Was there a Sir Morgan in-universe, or did Ares lead his entire life from birth? The Brits are pretty rigid about who's a Knight and an MP and all that. Was Ares just goading Morgan on like he was Ludendorff? If so, then I agree with those who said his true form, flashbacks included, shouldn't have been Professor Lupin. Professor Lupin isn't scary, and I don't believe for a moment a guy who looks as mild as him could have defeated Athena, Apollo, Poseidon, Hera, Artemis, Hermes, and all the others with Zeus himself all against him.
- Did the plane have a parachute? Did Trevor even bother to check?
Overall, I found the script to be weak, and way too eager to engage with
none of the fascinating questions the material practically demands be addressed. I therefore frankly care far less about Patty Jenkins returning than I do screenwriter
Allan Heinberg, who has apparently spent most of his career writing for shows like
Party of Five,
The OC, and
Grey's Anatomy, as well as various comics,
not returning. And while Gadot and Pine and Jenkins did fine jobs, a movie can only be somewhat better than its script in the
best of cases. ("Story by" credit also went to Zack Snyder and Jason Fuchs, who gave us
Ice Age: Continental Drift and
Pan. Daring suggestion: maybe hire a woman writer next time?)
That said, at the screening I attended, crowds of mostly women whooped with pleasure numerous times, and that's great. Noted, they were usually doing so when Diana was killing German grunts, not Nazis or HYDRA-Nazis, which I found somewhat uncomfortable, but still, I'm glad they (and many others, men and women) liked it. In the end, for all the speculation, setting this in WW1 was virtually meaningless apart from making a superficial break from
The First Avenger, whose ending (and much, much more) it copied anyhow.
I'm all for more women-led blockbusters, and movies in general. This was a mediocre one with a great lead.
B-