I mean, aside from the Grim Reaper "plot" which is a made up fan desire instead of just accepting it probably was a Mink Medicine side effect, the rest of these things can be addressed post Wano and probably will be lol
So basically zoro is a failure who went to odens territory as a swordsman but to kaido gold standard of swordsman still Oden
That's just slap in the face of basically 50% of one piece fan base who are zoro fans following zoros journey since day one.
Its like Oda introducing a top tier chef (streusen) and sanji never surpassing him (he did by baking the cake)