Hades wasn't in the movie...
Edit: ah, caught your edit
I said the Hades shtick because Ares was basically following what Hades did in Hercules: He hated the main character and wanted to see him fall so badly he made some mistakes along the way.
Ares however, had no reason to fight Diana one to one. When Diana killed general ComicBookVillain he could've just watched her realize how human beings where basically war hungry by themselves and leave it at that, then keep on feeding her hatred. You know, set up another movie later.
But they needed their big bad guy so of course he has to go all CGI on us. I mean, it wasn't that bad
and it didn't affect the flow of the movie that much. I could've done without it. I would've wished they did something like what Snyder has been wanting to do since Man of Steel but hasn't been able to: Give us a superhero grounded in reality. Give us a Wonder Woman that grows to understand human nature, bit by bit, not blowing it all in a gran finale that feels goofy.
But that's just my two drachmas. The movie is great anyway.