I'm so ready for people to start malding and scream bad writing when Luffy doesn't neg diff Kizaru. And this is coming from a Luffy fan.
I agree Luffy shouldn't be treated as the underdog after the yonko title, but a neg diff with an admiral ain't it.
This is what happens when you get blinded by agenda and doesn't take a look at the narrative.
Even without powerscaling I knew Luffy vs Kizaru was going to happen instead of Saturn vs Luffy/Zoro vs Kizaru/Zoro/Sanji vs Kizaru due to the narrative in Dressrosa about how Luffy had to surpass the emperors and admirals to surpass Roger's legend, which made anybody but him in the crew being the first to defeat an admiral impossible. You don't need powerscaling to understand that.
Even ignoring all the consequences it would have for the story Kizaru getting dfeated handidly will not happen for the simple reason Oda has been starting to significantly amp the tension and drama, starting with Robin being wounded, the reveal that Lucci is feeding the marine informations, Luffy shocked face at the power he felt last chapter, continuing with two allies getting brutally defeated (Sentoumaru and Stussy), Kizaru's sinister look while taking about Vegapunk assassination, the Mark 3 (much, much more advanced models of PX) going back in the hands of the Marine and Lucci's "betrayal". Add that to the fact the VAs and thousand of dozens of soliders are getting to land, that Blackbeard Pirares still haven't made their move and it's obvious Oda won't immediately defuse the situation by ridiculing the strongest antagonist (second strongest at very worst for gorosei wankers) on Egghead.
Add that to the fact Luffy already hd his "flex his power" fight of the arc against Lucci.
Add that to the fact it would completely make a mockery of Sentoumaru's sacrifice as he could just have let Kizaru enter and let Luffy neg him (imagine Luffy beating Kaido 2 chapters after scabbards risked their life fighting him lol)
What's funny is that the Sabaody narrative and proving that Luffy isn't an underdog anymore would still be respected by him beating an admiral high/extreme diff in 1 vs 1 without assist. Some ppl just want to see Kizaru get folded to satisfy their agenda, it has nothing to do with "narrative".