You want me be satisfied that none of the emperors properly acknowledge Zoro?
They didn't praise Zoro for Hakai.
Kaido was freaking out over scabbards, and telling them how he misses Oden, and that no one could do what he did. But when Zoro does, with even greater value, Kaido doesn't properly acknowledge it. Kaido was more stunned by Red Roc and scabbards than by broken bones half dead nerfed Asura.