To get back on track...
Hermes in the DCU has been portrayed as the god of, among other things, speed.
Diana was given speed 'greater than' Hermes and has previously beat him in a foot race before. Whereas you can argue if that's possible, this is in a universe where it is. It was in the masthead of the comic book for decades and was clearly stated in her origin(s) when Hermes was involved.
I don't care that she can't outrace him now, but that speed shouldn't be enough for him to win the fight. He gets shot by arrows fired by centaurs, so cleary he's not all that fast in combat.
As to the Zoom fight, it's a pointless argument. If you choose to ignore all of Diana's powers and downplay her as a hero, that's fine. However, given that she has always been portrayed as having one of if not *the* fastest reflexes in the DCU and that those reflexes are a core part of her character (the whole bullets/automatic gunfire/lasers/heat vision/Omega Beams versus bracelets schtick) as is the wisdom of Athena, goddess of strategy, and that she has an unbreakable lasso that can stretch to undefined lengths, then no, I don't see it as out of line that she trashed Zoom.
I will again point out how normal humans with normal speed using weird yet man-made weapons not at all related to speed (heat, cold, boomerangs) have repeatedly tagged/defeated Flash over the years seems somehow perfectly acceptable while the idea of a gods-gifted, alpha-level, reflex/strategy oriented hero gifted with speed greater than the god of speed taking down Zoom is out of the question seems a bit contradictory.