How is it rubbish? Is it wrong? Do you genuinely believe fans know more than the manager? Look, everyone can say "why didn't we just buy Caicedo, Kvaratskhelia, Osimhen and Frenkie de Jong, and we'd be so much better!". It doesn't mean the fans have any idea what they're talking about.
It actually makes me laugh when I see posts like "see, I told you he wasn't going to cut it!" as if that poster had any idea at all. It's Mount's first game, and while it wasn't a particularly good game by him, everyone struggled. Does that make Bruno a shit player? Or Shaw? Rashford? Apparently this is all on Mount. We were playing against Wolverhampton who had 3 absolute tanks in the midfield. They're not technically excellent, except maybe Matheus Nunes, but they're fecking strong, powerful and very difficult to play against, especially Casemiro struggled and looked like he was playing a veteran game, and when your most physical player is in that shape as a midfielder, it was always going to be tough.