Nope. Kozaburo never said shit about Ryuo at all. You guys are just making up shit just to make sense of the broken headcanons in your heads. Bring me the panel if you can.
Once again you fixate on a single word while ignoring the meaning of other words and things said in the manga...
"It was my strength that was lacking"
"Lolden wielded you easily even with so much haki being drained away"
"i don't have much time. If the fight drags on, enma will kill me"
So lolden wielded emma easily while zoro struggles hard, and literally says emma will kill him if the fight drags on and he doesn't have much time.
We can easily understand what this all means. Well people who actually read the manga can. Not people like you guys who are too deep into the agenda that you can't even see basic facts and can't even connect two simple dots to understand the mechanics of emma.
What those lines say without outright using the word "satisfy" is, Zoro cannot satisfy emma while lolden could.
We have never seen lolden struggle with emma AT ALL. We don't see anything that indicates it is affecting lolden or sucking out so much of his haki that it's actively killing him.
We can come to a conclusion by reading that. The actual, factual, logical conclusion that is supported by the manga and basically outright stated by zoro himself in the first pic above.
Lolden was far far stronger than zoro and had enough haki reserves to comfortably feed emma in battle and never have to worry about emma not being satisfied. That emma had enough haki from lolden that it neven needed to suck everything it can get out of lolden and put him in danger of dying from haki drain.
That is literally what zoro says in that page. This is a fact. There's no other way anyone can interpret that. You guys certainly do try hard to interpret in some other ways but manga facts from your own guy's mouth just fucks all that up.
"My strength is lacking"
"Lolden wielded emma easily at full throttle, while it is actively killing me when i am wielding it at full throttle"
These are pure cold hard manga facts.
And from this, we(people without a pro zoro agenda) can extrapolate that because lolden had enough coa reserves to satisfy emma in battles, it never needed to suck out his coc and convert it into acoc. That is why lolden did not unlock acoc by wielding the magic sword emma.
But zoro's own haki reserves are as implied by himself, far lower than lolden. So emma resorts to sucking out whatever it can get, and in that process, zoro's dormant coc that he himself didn't even know he had, gets brought out and turned to acoc.
That's it.