User blog comment:JustSomeDude.../You Should Fear Kaido/@comment-5774380-20150731123935/@comment-4899461-20150731134437

First off, we have no idea if all 7 (or even any) of his defeats were when he was a Yonko. He has been captured more times than defeated, so that means that other factors besides his battle ability have led to most, if not all, of his multiple imprisonments.

As I said in the blog, defeat and experience make a person stronger in One Piece. Once a person is defeated, they never want to be again, so they must become stronger.

Just look at Luffy:

His notable defeats always led to a massive increase in skill and power. Crocodile beat him twice. Rob Lucci and CP9 wiped the floor with him, then remarked that Luffy got on their level in a matter of hours.

The archipelago incident taught him that he couldn't even protect his crew, and was one of the main reasons behind the timeskip, along with the Marineford war, another big defeat. Oh, and Magellan kicked his ass too.

There are countless other characters in OP who have gotten stronger after defeats, including Zoro and all Straw Hats, Law, Hachi, Buggy, Smoker, Crocodile, Duval, Galley-La people, Bellamy, even people like Caribou, to name just a few.

Defeat makes people want to do better in order to keep on going. For Kaido, to be as powerful as he is and face the powerful enemies he has, and still be alive AND hold his position as a Yonko, is a very impressive thing. As the narrator said, "No one could kill this man."

You should fear Kaido.