You’re problem here is that Zoro is too weak to do all this? Let’s go through this.
Zoro will be able to reopen Kaido’s scar by the end of fight on the roof so that means he has the ability to just one shot any YC1 because I imagine there’s no YC1 with durability that matches Kaido.
Then we learned he can cut fire so he ends up fighting a YC1 who can one shot and has the exact fire cutting ability to counter King’s fire
then after that he finds fodder Orochi and cuts down some fodder.
You don’t think Zoro’s strong enough for fodder, a guy who can one shot and counter and assisting against Yonko. That’s way too much for Zoro.
Or do you have some King agenda that you don’t want him to get wasted by a person who counters him for some reason. You think king should fight Marco or some shit