Here's the thing. Let's say she isn't bullet timing consistently because she hasn't gotten the hang of her powers yet. She's still displaying a combination of skill and speed where she's parrying bullets fired at her back with tiny little bracelets, as opposed to just relying on her big old shield. Even calling that just aim blocking, it's still aim blocking loads better than anything movie Cap has done. Cap doesn't even have particularly good aim dodging that I can recall, and largely uses his shield (much bigger than the bracelets, or even Diana's shield) or taking people out from cover or otherwise preventing them from pulling the trigger.
Diana is jumping into the middle of swarms of gunman who are actively firing on her from all directions. She's clearly just better.
Couple that with being stronger? This isn't even a fight.