In my opinion, Erik Ten Hag deserves to be kept for at least one more season because he has shown good performance with Manchester United this season by winning the FA Cup despite many players being injured. Therefore, giving him more time and opportunity to develop with Manchester United seems to be a more sensible decision to improve Manchester United performance.
Even though it still makes sense for the Manchester United team management to retain it next season, Erik Ten Hag himself must be aware that he is being retained not only because the team was able to win the FA Cup. But he must be able to provide excellent direction to Manchester United next season because everyone can see for themselves the position in the Premier League where Manchester United finished this season. And this should be a reference that Manchester United still has to develop better with better gameplay starting next season.