Was there any thought behind this post or did you get triggered and it was just pure anger and rage?
You claimed Mihawk's attack was the world's strongest slash and he can't get by Jozu. Yet, you also claim Shanks attack or slash was stronger and would have negged Jozu.
Both of those can't be true.
Mihawk is the WSS. Shanks is not. He might be the second strongest swordsman in the world. Of course a character who has stronger swordsmanship skills and is stronger than Shanks has stronger attack.
Mihawk never called it the most powerful slash in the world. A fodder confused it for the most powerful slash in the world because the name none haki attack with that powerful.
Stop pushing your headcannon. Mihawk wasn't trying to get past Jozu. He never attacked Jozu. If he wanted to he could have easily cut him down like Mr. 1.