I think for your take to be fully valid youd have to be cherry picking your criticism. No player is immune from criticism, and I myself doubted fernandes around his spell of 3 red cards. I can think of a couple of players maximum who were fully consistent in their time at united - cantona, scholes, giggs for example all suffered criticism.
But my point is that even when Fernandes was clearly and plainly a fantastic player, which was clear early on, he has had some simply absurd, hyperbolic nonsense aimed at him. We're not talking about measured criticism of aspects he could improve. The guy was delivering goals and assists at a rate equal to most midfielders in europe and you had posters simply refusing to accept that maybe he isn't 'part of the problem.' He would walk into most teams in the world and has been failed over and over again by united hierarchy who decided to build attacks around him with the likes of sancho, hojlund, antony, etc. This is a classic case where posters who were hysterical and nonsensical can now invoke the argument that 'oh he's better now so no complaints' as if huge amounts of criticism wasn't way way over the top. I don't mean you specifically, but it wont take much of a deep dive to find posts that would suggest the guy has been nothing but a toxic stat machine for 5 years, which has never, ever even been sort of true.