For Last Time! Oda is showing us what it means to be WSS through Zoro Feats, not Mihawk Feats.
If Zoro wasn't given Swords against Hatchan He could have Lost
If Zoro didn't Upgrade his Cutting Technique He wouldn't have Defeated Mr. 1
If Zoro didn't increase his Strength to the point He can send Flying Slashes, He wouldn't have Defeated Ohm's Iron Challenge
If Zoro didn't have CoO, He could have being Hit by Hyouzou & got Fatally Poisoned
If Zoro didn't have CoA, He would have Lost against Pica
If Zoro didn't have CoC, He would have failed Enma's Test & got Defeated by King
Oda literally showed Six Tools needed to become World's Strongest Swordsman
They are ---> Swords - Cutting Technique - Strength - CoO - CoA - CoC
If Zoro Lacks in any one of these, He can't Dream of becoming WSS
If Shanks was better than Mihawk in any of these Stats, Mihawk cannot be WSS! Not even close
But Reality is Fixed, Mihawk is WSS, no Mental Gymnastics gonna change that