On a more serious note; I think one of the reasons Dutch managers sometimes (often times, whatever) fail abroad is exactly the opposite of what Ten Hag is saying here. We Dutch people usually think that we are the inventors and sole owners of the correct way of attacking football. It doesn't matter whether you have Franz Beckenbauer, Zico or Harry Maguire: thou shalt not ever play a long ball even if you concede 27 goals every game. There is only one way, and that is the Dutch way.
In reality, different leagues and different teams require different playstyles. Of course, with enough good investments you can build a team that suits your style (Like Pep at City or Klopp at 'pool), but for Ten Hag it would be a bit mad to try and play as he did at Ajax with the squad United has.
I'd say Ten Hag failed massively on the transfermarket (Antony wasn't even THAT good in the Dutch league, nor was Mount, though that's a bit unfair), but this particular quote saying he won't play the Ajax way, because he lacks the players to do so, isn't as damning as people make it out to be.