This is really myopic. He has a squad shorn of about every prime age player supposed to be at his disposal. Running a thin squad full of inexperienced, lightly experienced, and developing players.
Is this true?
The squad is horribly unbalanced, underperforming, and above all has been constructed with no plan whatsoever. But there’s 26 players, with an average of 33 international caps each. There are guys throughout the team who have played in Europe’s biggest leagues, won the biggest competitions, etc. The only area that's (ostensibly) lacking proven talent is up front, where Antony and Rashford would have been filling those slots had they not been sent out on loan.
The issue is not that there’s too many inexperienced players throughout the team.
A reminder:
Goalkeepers
Onana, 29 years old, 48 international caps
Altay, 27, 10 international caps
Heaton, 39, 3 international caps
Defenders
Lindelhof, 30, 71 international caps
Mazraoui, 27, 33 international caps
De Ligt, 25, 50 international caps
Maguire, 32, 64 international caps
Martinez, 27, 26 international caps
Dorgu, 20, 6 international caps
Yoro, 19, 0 international caps
Dalot, 26, 29 international caps
Shaw, 29, 34 international caps
Heaven, 18, 0 international caps
Evans, 37, 107 international caps
Amass, 18, 0 international caps
Midfielders
Mount, 26, 36 international caps
Fernandes, 30, 78 international caps
Eriksen, 33, 142 international caps
Diallo, 22, 6 international caps
Casemiro, 33, 75 international caps
Ugarte, 24, 29 international caps
Mainoo, 20, 10 international caps
Collyer, 21, 0 international caps
Forwards
Hojlund, 22, 24 international caps
Zirkee, 23, 6 international caps
Garnacho, 20, 8 international caps