So, your "point" is if Gvardiol plays LB and has a shit game, people will criticize him for having a shit game? Well, no shit.
The same applies to anyone else. If Jack has a bad game, he gets crap. Like Nathan, Manuel, Eddy. Even the big dogs like Erl, Ruben, and Kev aren't immune to social media/forum/general fan backlash when they have bad games, as we've seen this season. Pep gets bashed after pretty much every loss too, regardless of what he's done or hasn't done.
But, understandably to an extent, newer players who haven't quite proven themselves yet and contributed as much to our success will probably get a bit more flak than the rest. Go look at what was said about Ake and even Rod in their first seasons, for instance. (For what it's worth, I fully believe in Gvardy and think he's gonna be fantastic. He hasn't had the smoothest of first seasons, but very few players do at City under Pep.)
Why are you so intent on arguing such an obvious point that nobody even seems to be questioning? Yes, most people would probably prefer Ake to start based on past form in this fixture. Yes, if Gvardiol starts ahead of Ake and does badly, people will point that out. But if he does well, people will point that out too. There's no vendetta against Gvardiol.