No it isn't. Not at all.
You think it's dumb for Kaido to be killed by a samurai who has connections to the Shimotsuki who are FROM Wano, the land Kaido took over and enslaved for years and killed the future Shogun?
You think it's dumb for Zoro to kill Kaido with the blade of the man Kaido killed?
You think the foreshadowing is dumb? You think Oda made Zoro say that he wants to take Kaido's head for no reason?
If Zoro gets up then Kaido should get up.
It might be too hard for your petite brain to understand, so don't call it dumb.
You think it's dumb for Kaido to be killed by a samurai who has connections to the Shimotsuki who are FROM Wano, the land Kaido took over and enslaved for years and killed the future Shogun?
You think it's dumb for Zoro to kill Kaido with the blade of the man Kaido killed?
You think the foreshadowing is dumb? You think Oda made Zoro say that he wants to take Kaido's head for no reason?
If Zoro gets up then Kaido should get up.
It might be too hard for your petite brain to understand, so don't call it dumb.
Nor has zoro ever taken down Luffy's major villain
And Yonko aren't Zoro's opponents to surpass or finish