Rugani is doing just fine. Yes, he's going to make some mistakes, but I'd rather we let him make them at this point than Benatia.
He needs minutes in important matches to develop properly. Whether folks like it or not, this year and next are very much transitional years for this team. That's what happens when 3/4 of our world class BBBC exits, Marchisio and Chiello start feeling their age, etc. Our generational defence and that Italian spine of ours has gotten pretty darn old. Going to need to have patience with Rugani, Caldara, and our future RB.
The midfield also obviously needs a serious injection of quality.
Some people are probably overhyping Rugani, but to my eyes he's been our 2nd best CB so far this year. Max should have definitely played him in that last match.