That’s not all we know. We also know Jozu did in fact stall Kuzan for an extended period of time. That’s also a fact. Multiple events occured while Jozu and Kuzan were essentially fighting 1v1… and the fight ended ONLY AFTER Kuzan got a sneak attack on A distracted jozu
also we saw Kuzan vs Doffy
So we have seen Cracker Vs Kuzan, Doffy vs Kuzan, and Jozu Vs Kuzan… And from all we have seen on panel, for some reason you think Jozu is the weakest guy among these 3 despite his performance against his same enemy?
You are assuming that in the mess it was Marineford Aokiji(stop calling him Kuzan wtf) and Jozu was fighting each other 1v1 only and then Aokiji took the moment of Jozu being distracted for whatever reason to win the fight? Again the sneak attack card in a fucking war... Such a nonsense argument.
That's the panel where Jozu cowardly attacks Aokiji when he was fighting Whitebeard
That's the panel right on the next chapter after Whitebeard cough blood making Marco to worry about him and being hit on his back by Kizaru and then Jozu worried about Marco.
And then the right next chapter.
So Jozu couldn't do the same as Doflamingo here.
Jozu saw when Aokiji started to freeze his arm and couldn't prevent the rest of his body to be freezed meanwhile Doflamingo had his whole body freezed and still could get out.
And then we have Luffy that beated Doflamingo telling Cracker haki is greater and having a hard time against him while also needing Nami's help, plot armor and a gag situation to win Cracker.
So yes Jozu is the weakest of them.