Got 1 attack in also known as his strongest and it didn't knock down kaido😴 if he couldn't do it with other top tiers with him how do you expect him to do it alone
And even in that attack he had no help from anybody. He called Kaido's name out, told him he has to crush him before touching Luffy (unconscious) and then proceeded to perma-scar him.
That was a completely solo feat.
Nobody's saying he's a top tier, but you shouldn't disregard rooftop feats and claim that him struggling against King makes him the weakest YC1. The reason he's struggling is because King is that strong and the community underestimated him.