How can you say Zoro just got Enma and defeated King?
- Fought two Yonkous
- Scarred Kaido
- Got ACoC
- Defeated the strongest YC1 Level dude
Just because we didn't have more of Zoro's backstory, that's not a demerit to the character's performance in the arc.
Yes, things that should have happened didn't happen, but other good things also happened and that's what we must consider, we can't turn all the Ws that Zoro picked up into Ls because of unresolved plots.