When God said that it is not good for man to be alone, Adam was alone with God, in paradise, in a sinless relationship.
So I ask you, what was the good that was missing?
Certainly, Adam was not missing any good thing, and God wasn't missing any good thing.
I submit that the good that was missing is the same good spoken of when it is written that, "God works all things together for the GOOD of those He has love Him and He calls according to His purpose.
Perfection speaks of no more potential to change.
Human beings are defined by our changes.
Human beings are a complex of intellectual, emotional, willfull and biological processes.
(A process is a prescribed sequence of changes.)
We are and always will be changing; so, pace yourself.