I don't agree with you.
I believe De Jong will definitely be able to adapt to the Premier League game, especially De Jong under Coach Ten Hag, with whom they worked together at Ajax.
Firstly Frenkie de Jong never playing for a club from the premier league which may be one of the reasons that de jong will need time to adapt to the premier league
second i know ten hag is a ex ajax coach and de jong has been playing for ajax for about 3 years. But what needs to be understand is that coach and players are in different situations, they are not in the Eredivisie league, the Premier League is clearly very different from the Eredivisie league, so both will need time to adapt and adjust.