I like Zoro and all but his entire CoC writing imo has been awful.
In Wano both Kaido and King tell Zoro that he has CoC, during the battle against King, people around Zoro faint, and he also uses CoC during his fight against King.
Then in Elbaf we get Gaban telling Zoro that he has CoC, and Zoro's response is "Wait I have CoC?"
Next the goal was to control his CoC which came down during the Sommers fight, which of course didn't last that long.
All he had to do was remember a quick Mihawk flashback, in which Mihawk talked about CoC, which btw this dumbass Zoro somehow forgot.
And after that quick flashback, Zoro is now able to control his CoC.
This is no hate on Zoro but this again really shows you, that Oda really doesn't care about Zoro's character writing.