There are still uninformed people who believe that the title of Kaido is in the ANIMAL sense.
since Oda stated in a 1vs1, he is the winner. "If it is one against one, Kaido will win (translation of Anime)."
If it is one against one, always bet on Kaido (translation of Viz manga).
This is the same man who challenged the entire Navy and the Four Emperors ONLY and yet, they couldn't finish him.
It made Kaido frustrated to the point of being depressed because all he wanted to do was die. But as oda said, "No one could kill this man. Not even himself ".
His title was translated by some manga website as" Strongest Beast Alive ". It was a translation error because in the official VIZ translation, which is directly associated with Oda (and we have to pay to see the translation) , is declared as "On land, sea and air. He is the pirate known as the strongest Creature of all living things ".
And Oda used the word 'Saikyō Seibutsu (最強 生物): which translated as The Strongest Biological Being / The Strongest Creature Among All Beings. Seibutsu includes all living things in the world, including humans. The reason why free manga sites misspell Kaido's title is because the English word "Creature" has plural meanings, but in the original scan there is no ambiguity because the word 'Seibutsu' is the one being used, which is why Kaido was not given the title "Strongest Man" or anything like that, because he is simply not human.
Kaido's title isn't ambiguous at all in the japanese version, his title 100% include humans.
You can do a quick research on what Seibutsu mean:
https://en.wiktionary.org/wiki/せいぶつ#Japanese
living thing, life, organism, creature .
https://www.kanjijapanese.com/en/dictionary-japanese-english/seibutsu
seibutsu creature 2. seibutsu living things.
The ambiguity only come from people reading the English chapter and assuming the word "creature" is to be understood in the animal sense.
In japanese it clearly mean Kaido is the strongest living organism/thing and quite obviously humans are living things.
Kaido's title 100% put him above any human alive in the series, the only way Kaido isn't the strongest character is if his title is fake in the first place or if someone surpass him in the future.
Even Mama Yonko recognized and respected power of Kaido and could not understand the idea of Luffy defeating Kaido in chapter 871 saying: "Kaido?!? !! Mamamama ...
You will never bring this thing down! ". Even when we knew that BM itself is a freak of nature, but here we are witnessing that even Big Mom knows that Kaido is something beyond any of our minds could think of.
Not to mention that she laughed again in the current chapters about Luffy defeating Kaido.
Romance ACE, Skull recognizes him as the best in 1x1, and superior to the WB, the WSM.
The closest to kaido's defeat was against ODEN, in which he ended up winning (he underestimated oden in its weakest form). We know that in order to put Kaido on the ground and almost defeat him, you need to do more DAMAGE than Tougen Totsuka and mortally wound him (if you are a swordsman or have a sharp weapon like the 4 emperors), the 4 emperors including Kaido , has sharp weapons, and they never replicated what ODEN did to Kaido's body, which raises doubts about how KAIDO suffered 7 losses? In its introduction it was never said that these defeats originated in 1x1 clashes, which leaves the possibilities of 1x1,1x2,1x3 open, or even more, as examples we have SHIKI vs Garp and Sengoku. It is also mentioned that he was captured 18 times, how was a person captured 18 times and had only 7 defeats? The means used to capture him may have been used to defeat him, in group battles or not.
Referring to the admirals who had lethal DF, Akainu, Aokiji, Kizaru with their lasers and never caused any injury to Kaido that is evidently exposed as a scar in kaido, and we have examples of Aokiji vs Akainu in which they were left with scars, Luffy stayed with Akainu scars, among other examples, Jozu lost his arm, the lethality of his Dfs does not apply to the monster called kaido, because logic does not apply to YONKOUS.