There is a reason why german coaches are probably the best at building firm squads with players that aren't obvious world beaters. The weaponized autism in their discipline, good management and state of the art sport sciences makes even mediocre players look better, because they're part of the functioning unit. Ten Hag and dutch football in general is from the same cloth, which is why lot of players that were top notch in Ajax system, seem underwhelming after joining other clubs. I would still exclude DeJong, who for me is underachieving, but world class in potential. Unlike likes of Zyech or Antoni.