First, Yasu and Komu was because of Orochi...
Second, Orochi was the problem, he brought Kaido to Wano with Money, and he was financing Kaido all over 20 years :)
Third, it isn't about being smart, it's about coherence.
Suddenly Zoro realizes Orochi isn't the problem when he gets Emma??
Ok...
So is Yasu proclaiming that Orochi ain’t shit without Kaido and dying saying that someone must cut kaido’s head off supposed to show us that Yasu is dumb?
I mean if Orochi is indeed the problem then what the fuck is Yasu even talking about. Mans a fuckin idiot. I mean Zoro clearly cares about him and heard his dying words but he’s a fuckin stupid idiot. Of course right now Orochi is the problem. You wonder why Zoro would ever listen to his dead idiot friend,
funnily enough, when Zoro gets emotional and tries to kill Orochi, Denjiro stops him. Is Denjiro an idiot too? Does he know Orochi is the problem here? What is he doing? It seems Zoro who is very emotional at that moment is the only person who is thinking correctly, Orochi is the problem. Both yasu who just died and Denjiro who has been planning revenge for 20 years are the idiots here.
And yes, even after multiple days pass and Zoro has cooled off from his emotions, Zoro thinks very hard about the situation and he should still fully believe Orochi is the problem. Even after seeing Denjiro change sides, Orochi is the problem. This Is the fact that should be in Zoro’s mind and everyone who belived that maybe Kaido is source of everything wrong here is delusional.
And then suddenly Zoro very inconsistently changes his mind to the side of the people who are wrong such as Denjiro and yasu and the scabbards, now Zoro thinks Kaido is the problem. Fuckin idiot