Its frankly off even from this very arc. Kizaru outclassed Snakeman with little effort, something Katakuri and even Kaido had trouble with.
He even wasnt necessarily having trouble with Gear 5 until he shot one laser at Luffy who countered it with White Star Gun.
At that point, Kizaru has been entirely silly, he has NOT attacked Luffy after getting up since. He literally does the following after Kuma's flashback
Attacks Franky:
Attacks a railcar
Attacks Kuma and Bonney, only to be stopped by Luffy
Attacks them AGAIN, only to be stopped by Sanji
Attacks Vegapunk AGAIN, only to be stopped by Luffy
Not even including the 3 separate times he tries to kill VP before this point. Its a repeated pattern where Kizaru quite literally has not "tried" to fight Luffy seriously outside of 1 kick from G4 and 1 laser shot in G5.
Its a complete and utter mishap argument from the side that hates Admiral, fueled by Oda's own failure to make Kizaru actually competent and trying to fight Luffy, but instead mindlessly going after VP because he follows orders to a T.
All we have to go on is that he keeps recovering from minimal damage, so now we have to wait a AGAIN to see if Dawn Cymbals actually hurt him more signficantly or not, because the last two hits left him unscathed.