Isnt it Oda who created the Roger, Rayleigh, Shanks, Mihawk, Rocks, Shiki and Oden as the supreme combatants of this world?
Is swordsmanship the only combat style that is separated from others through rarest achievement in the show - black blades?
Is Oda the one who created Zoro with superior swordsmanship to them all and gave him Demon God that takes it to a whole another lvl?
You dont want to play the feats game, lol... It is the same as people who trashed Zoro when he had no feats flipping sides and abandoning feats game once Zoro got best feats in the verse... Just because Kizaru and Kaido dont have a feat of beating a top tier doesnt mean they are weaker than Akainu. Kaido doesnt have a feat of beating top tier and yet Oda himself chose him over Akainu...
Akainu's superiority over Kizaru simply doesnt exist. Does he have better feats for now? Actually no. His feat of beating a top tier is offpaneled and we havent seen anything while Kizaru actually has on panel feats of going toe-to-toe with Dark King.
But I don't see anything impressive about Akainu beating Aokiji, we know that since the introduction of Whitebeard he is capable of beating any higher level with the exception of Kaidou and he doesn't even need to duel for 10 days against them to prove it, we know that Whitebeard wins Aokiji, We know that since the introduction of Kaidou, that Kaidou beats Aokiji, but in Marineford we knew that Akainu could beat Aokiji? No, so Akainu still needs to prove that he can beat opponent in which Oda already said that Whitebeard and Kaidou are winning, same for Mihawk, Mihawk according to his title beats Fujitora, but is Akainu able to beat Fujitora? He needs to prove it, because he simply doesn't have statements, titles that make him capable, as is the case with Kaidou, Wb and Mihawk.
Another example:
Can WB defeat Dragon? He can, and for that he doesn't even need to fight him, Oda through his title is validating the fact that WB > Dragon.
Can Kaidou defeat Dragon? Yes, Oda through Kaidou's title and statements is validating the fact that Kaidou
> Dragon.
But can Akainu beat Dragon? No, he needs to prove he can by fighting him. LMAO
Defeating another top tier is no better than titles and declarations, especially when it comes to globally scoped titles.
Defeated a higher level? Okay, what about the rest of the other higher levels?