Irrelevant.
Kaido knew goofy was soyboy by that point. Like, goofy was in nikal form when kaido made that statement. So, kaido clearly included goofy the soyboy in it. And, since he made that statement while 1 v 1 ing goofy, the previous rounds are also irrelevant. Cause he said no one can beat him regarding that current goofy fight. Meaning he was saying goofy the nika soyboy can't beta him either. Yet goofy beat him.
That's why I'm saying kaido was basically giving himself a pep talk there. It was in no way a factual powerscaling statement.