It's because of those feats.
Dragon!Kaido has the worst of feats. Like he was just a punching bag.
- Vs Pre Udon Luffy
- Dragon
- G3 knocked him around and forced out of his transformation
- Base
- Vs Scabbards
- Dragon
- He was getting diced up, and repeatedly damaged by the Scabbards
- Base
- Once he decided to defeat them, he low diffed them
- Vs Supernova
- He was used as a punching bag for 2 chapters straight
- He literally has only one successful attack (Boro Breath), and that was because Mama knocked Zoro down so he couldn't cut it.
- All his other attacks were easily neutralised by Zoro
- He quickly switched to Hybrid Form after Zoro's Kokujo Ou Tatsumaki
Like Dragon!Kaido's feats are utter crap. If Oda didn't want us to think Base Kaido > Dragon!Kaido, he shouldn't have drawn Dragon!Kaido as such a jobber.
No one can tell me how Dragon!Kaido beats Santoryu Zoro except by special pleading to Kaido being stronger than Zoro (true, but Dragon form is useless against Zoro).