Kaido was injured far too early and easely.
What's the point of hyping him as nearly-indestructible if penetration Coa even from someone who is far from a top Tier can injure him so easely ?
It would have been better if it required a really extremely powerful Coa to injure Kaido.
Somethimes durability is not consistent. His name is Gedatsu. This guy fell from Sky Island before Kaido.
And he lost to Chopper.
I think Kaido is injured that early to hype up his recovery rate. In Impel Down it was stated that awakened zoan has high recovery.
Kaido is a mythical zoan so his recovery rate should be higher than normal zoan moreover it is Kaido, a yonko so compared to other mythical zoan, Kaido's recovery rate should be much higher.
I think the injury Kaido took from Red Scabbards wasn't seen when Kaido trankformed into his fullzoan form.