Nah, I don't buy that in this particular case.
You could just say that it all comes down to how good he is at the end of the day - and that would be partly correct. If he had been a genuinely world class player, he would've shut up his critics by playing football, no problem.
But it would be slightly disingenuous to just say that, wouldn't it?
As United fans, we know very well what Maguire is: nowhere near a world record fee defender in terms of his actual ability. A player with obvious flaws and limitations who was never worth that kind of money.
That is not his fault, though. And the reason he has ended up as a meme has much more to do with his transfer fee, and following that: a relentless eagerness from a segment of fans to find fault with him, than his actual performances, which have been as expected (I would say).
He's a decent player in the right system. There's no reason whatsoever why he should be regarded as an utter clown. And it's obvious that he's aware of how he's perceived, and that this has negatively impacted him. It's very easy to say that he should rise above that as "the captain of one of the biggest sporting institutions in the world" but there are obvious mitigating factors there:
A) He's a decent player at the top level, nothing special and clearly not worth a record fee (that he never asked for).
B) It was Ole's stupidity to make him captain. That never should've happened and only added to the pressure on him.