Boxing is such a garbage sport
Its bad enough that a total rookie can hang for 10 rounds with one of the best to ever do it or its inherently shite enough that you can rig a game like this and make it believable
Think of how much Fujitora tolerated Doflamingo and held himself from putting him in chains.
Admirals like Saka or Greenbull would never let him escalate things to the point of setting up a birdcage. Kizaru would probably just be chilling throwing commentary on the fight on live broadcast.
Besides all the goofy shit by the Vegapunks and Kuma's flashback, I gotta say Egghead is a super well crafted arc
Oda has not lost his mind completely, he just took a long ass dump called Yonko saga and is now back in business