WB simply doesn't care about being the pirate king he never wanted. he had what he wanted and the other didn't challange him either.
Kaido and BM are different they are after the title of being pirate king, they tries to amass power. especially Kaido if he could defeat those he would have done so, you can remember what he told Yamato that Oni should rule by strength. Shanks was able to stop him even though he can fly like hell and King as well. Shanks has powers that can only explained by monstrous CoC haki. he stopped Kaido , stopped the war even if there were 3 Admirals , Garp , Sengoku etc. Akainu he is hot headed and wanted to kill Luffy no matter what was sweating.
sure Akainu and Kuzan can fight 10 days because they are close in powers but no matter what Kaido will be defeated before the sunrise even if he was mainly against Luffy, sure others fought him too but only Zoro and Yamato were able to land attacks that hurt him a little bit.
don't tell he is exhausted. Akainu and Kuzan fought for 10 days and the so called strongest creature will go in less than 12 hours? even if you could say so the scabbards , and the other supernovas, and Yamato could equal even a day against Akainu or Kuzan no they cannot.
those title are just for hype , WB's title was maybe the most creditable one since he has his DF that can destroy the earth and has a monstrous haki of his own as well. he was so sick , than his life even before the war was only maintained by continuous medication and still was able to fight against the 3 Admirals.
BM and Kaido are in my eyes the weakest Yonkos. it is as simple
BM herself even she needs the giants to have a chance against the other Yonkos.
Luffy will not be the strongest even if soloed Kaido. he will be always the underdog .
he will surpass Kaido and BM in this arc though like he told them. the help he got is really nothing against a top tier, like you mentioned before Akainu and Kuazan fought for 10 days. and those who fought Kaido together were no were a match for him and he fought them maybe for 2 or even three hours? so theoretically he can go against one as strong as him for 10 day - 3 hours but no Luffy will defeat him at the end of the day. the help was there just for Luffy to power up and then come back. he might get help again but again to stall Kaido again like Yamato did.
Stop the lame excuses
Primebeard and Roger never beat any top tier
No Great Pirate has defeated the other 1v1
Yet you wanna downplay KAIDO AND BM
Shanks with his crew stopped kaido and king
Look impressive indeed
Are you okay?
Kaido fought BM for 3 days
Fighting multiple people without a break for 3 hrs is more taxing than fighting 1 person
Fights vs Luffy won't go days
Stop daydreaming, Oda will have anyone who can fight for days last only hours vs Luffy
Those days battles are just a way for Oda to offscreen battles.
So luffy needs help, doesn't matter coz he will Power up and get again help
How does that even make kaido look weaker than Shanks ? Lol when kidd who fought Shanks doesn't think Shanks is the strongest.
Luffy who powerup twice and might another PU still will struggle to beat Kaido
Which means luffy is gonna be even FA level this arc to barley beat Kaido
That doesn't hype Shanks coz Shanks couldn't beat kaido! Shanks was never King of 1v1 nor WS of anything.
There's no statement from kidd, Oda, anyone that days Shanks>Kaido
You are stuck to your opinions which are just wishes.
WB feared fighting Kaido for decade +
"Bm is weakest coz she wanted giants to beat other Yonko" forgetting that YONKO are in stalemate for decades