I think Ten Hag lasted longer at Manchester United. I would also like Pochettino to be the person to manage a team full of success like Manchester United, because Ten Hag does not know the opportunities he has. He can't use it correctly. I think they should be dismissed from that team and move on with a better candidate. I don't understand why Manchester United management is giving him a chance because he can't manage as well as Arteta. Arteta is doing everything for Arsenal and it is understandable that he did not provide continuity, but I think Ten Hag is managing terribly.
Regarding Erik Ten Hag future with Manchester United, it seems like it will be safe or he will stay with Manchester United for a long time. This season, Erik Ten Hag failed to bring Manchester United to a top 4 finish, which of course was a big failure for Erik Ten Hag this season. But yes, on the one hand, there is no hot issue about Erik Ten Hag dismissal, so I think Manchester United management will still give Erik Ten Hag time next season.
Erik Ten Hag success in bringing Manchester United to the FA Cup trophy is of course an important point in Manchester United management's consideration of him. But currently there are quite a lot of good quality coaches who don't have new teams, such as Xavi, Tuchel and several other coaches. So, if Manchester United is looking for a new coach, they will definitely choose between the two coaches.