Well, do you actually think Kaido had potential in the first place? Judging just for his intro alone, I was scared of the potential threat he could be for our protagonist. Oda's worst decision to date in my book is making the decision of develope goofy samurai Orochi and the scabbard retaliation plotline. Oda could have gone straight to Kaido's backstory in act 1 and 2, alongside his crew (numbers,calamities, and F6), so we could've known their motivations and personalities a lit bit more. kaido's tendency to commit suicide, his Rock's past and his relation to Wano country (endgame material) and his beastly appareance and presence. How the fuck could you reck such potential?? That is beyond me. He could have been a great villain , better even than Doffy, but Oda just didn't care at all, and now, everyone hates Kaido for being bland and uninsteresting in his own arc. I am dissapointed but it is how it is.