So you want just ignore what happened before, that showed Zoro getting overpowered each clash which obviously means he is struggling? What kinda biased observation is that? Ignore everything that makes Zoro look bad...lol
What's next? You will ignore all the attacks Zoro hit King with except the last one, so you can say he one shoted him?
How he is he not struggling right now, when he is huffing and sweating all the time?
Nobody in the war is huffing as much as Zoro nor sweating as much as he does.