The inconsistency of DCEU's superspeed (SPOILERS)

This isn't a DCEU issue it's a comics issue all around, Spider-Man due to Spidey sense in a 1 on 1 fight should be impossible to hit as his senses should warn him of any significant blow and his enhanced abilities should make it a piece of piss for him to dodge them, also no way Cap can take Spidey in a fight, Caps meant to be peak human abilities, Spidey is beyond human levels however, so Cap's abilities are piss compared to Spidey, but Cap is shown to be more than capable because...comics.

Also Superman's speed doesn't mean anything to others being able to hit him, he's Superman he often intentionally takes shots because he knows he's invulnerable, any damage he may take is easily healed, it's why people can surprise him with their weapons because he simply assumes everything is going to be fine.

But as for how can x hit y if y can hit z but z is so much faster than x, Superman is fast enough to actually attack Flash at super speed but Flash is still too fast for Superman to fairly belt, it's close but not equal, Wonder Woman can hit Superman because she's both A: enhanced herself & B: instinctively a better fighter, Superman when he fights is throwing punches at where you are, Wonder Woman is throwing punches at where you are going to be, she knows by subtle movements the likely path you will take, the fact she can fight Superman hand to hand is a sign of her skill closing the gap between the difference in their powers, conversely Batman can do the same with Wonder Woman because her abilities don't extend too far beyond his training to give him a shot at lasting a few rounds.

The bullet bouncing things just meh whatever suspension of disbelief, but Doomsday makes sense, Superman is severely hindered in the Doomsday fight in BVS, not only is the battle ground got kryptonite particles in the atmosphere, Superman has already eaten 2 direct doses right to the face less than 30 minutes prior, and again Diana's experience allows her to fight smarter than the hulking rage mutant, where as Superman is less skilled a fighter there by making the Doomsday Vs. Superman fighting more evenly matched, and if you mean Batman dodged hits from Doomsday it's not true really, he dodged heat blast's from a distance not actual punches up close, over a long enough distance with a clear indicator of trouble most people can dodge most things.