The issue as I tried to explain in a previous comment is that the accuracy of calls really has never been better, but that makes the few bad calls stand out even more. I personally remember many games in the Big East where fans were incredulous over guys like Tim Higgins. I'm not sure how anyone can objectively say that calls are worse in 2021 than they were in 2006.
As I said, I think it is fine if Capel is mad enough about a few potentially bogus technical calls to comment on it and risk personal repercussions. I don't agree it's a wise thing to do, or a great example for his players, who you note already have a reputation for arguing with refs, but he's an established ACC coach and maybe he knows what he's doing. I just think posing this as some sort of righteous crusade is laughable.
Pitt loses games because Pitt is a bad team. If they lost a single game attributable to bad refereeing, that means they still had 21 other games that went just fine.