Whatever though process you have behind King's portrayal means nothing, he's not Luffy's opponent. If he's Zoro's, then its in line with who he is, a YC1 with the potential to give a decent fight.
Like I've said before, I would have agreed with your agenda if the story stayed the same as it was between 980-1000, where the 5 Supernova who fought Kaido/BM the 10 chapters after actually intended on fighting Kaido.
Zoro still can provide damage on the roof vs Kaido. Luffy won't win alone.
1010-1020 has painted a FAR different story. Killer has given up on fighting either Yonko entirely. Kid/Law have shifted focus to fighting Big Mom, and Zoro has yet to utter fighting Kaido again since leaving the roof. This is my point. It's reality. It's not my fan bias. It's literally the story telling me it's the case.