Wow! Hot topic!!!!
Kudos to all of you. You're bringing real points up and not just saying you don't like it because 'you're not feeling it'.
But there's a certain image of Kaido that has been built-up, how many times was it stated that he's a monster that couldn't be taken down in over 20 years by characters in Wano?
This is what I mean about people possibly underhyping Oden.
In some cases I believe that sentiment stems from the perplexing anti-Oden movement. I've enjoyed the fellow from the start, understood way before any of this that Oda was setting him up to be Herculean, and read the signs of what it meant that if a lazy-ass out-of-practice thug like Ashura who can pummel Jack in a second bows down to Oden, then yeah, Oden is a veritable wrecking ball.
In essence, it's Luffy's job to outdo Oden in this arc.
If you buy Oden (and I do) then you accept that Luffy must pick up where Oden left off and definitively defeat Kaido. If he manages that with Momo, he will have overcome Oden and taken that much closer a step to being close to Roger level god-tier.
But literally none of that works unless you think Oden is a powerful dude. And a lotta ppl, maybe no so much here, seem to be confusing 'not liking' with 'not being powerful'.
Has Kaido been built up? Yes. But Oden is just that monstrous. And it's Luffy's job to approach going beyond that. Since we know Kaido has been bested, it shouldn't take anyone by surprise. I think just a lot of readers are sour on Oden and seeing a character they don't like doing something of that magnitude causes the sourness to overflow.