You did make stuff up. Barza beat him in minutes because he played as RB with some degree of frequency. As a CB, it wasn't particularly close. Rugani played substantially more minutes than both Benatia and Barza in Serie A. He played the full 90 minutes in 11 of our last 14 serie A matches, locked in a scudetto fight with Napoli. 7 of our last 8 matches, full 90, even after we were knocked out of CL. Still starting almost every Serie A match. Coincidentally, the only loss we took in those last 8 was the match he didn't start against Napoli.
And you remember one shaky game? Wow.
And again. We lost 1 match of 25 with Rugani starting. Against Roma, Inter, Milan, Lazio, Torino away from home, we went 4 wins - 1 draw with 2 goals conceded, and 4 clean sheets. With Rugani playing the full 90.
Super shaky, bro. He must be terrible. He didn't deliver at all. That's why we lost the scudetto in the end.