Ronaldo played with winners who prove them selves with or without ronaldo
Alex Ferguson,Alegri,ancenloti, Jose morinho and zindane I know u will raise an eyebrow with zindane. Zindane won laliga and cops dey rey without ronaldo even took Madrid to the semis.
Messi only played with pep and only pep had be only to prove himself without messi. Even Luis Enrique has not been able to prove himself without messi.

So my conclusion Messi played is careers mostly with Average coaches and turn dem into title winners with him but couldn't reciprocate such feat without him expect pep why Ronaldo played most of his career with world class coaches who were already made before coaching him and still went on to deliver without him. Jose,ancelloti,zindane, Ferguson.
So it is safe to say these coaches has credits for Ronaldo rise to stardom