I also don’t believe in Ten Hag, he is not consistent in his performances and he do have internal problems with players which is not a sign of a good manager.
Last season, Manchester United’s performance was good in the beginning of the season, but towards the end of the season due to some wrong decisions, the team performance went down due to injuries as well, but with all the money spent to sign the wrong players in the team, I think they should have signed better players that will bring progress to the team, but Ten Hag prefer to sign his former players which the Premier League style of play has became difficult for them to adapt.
If Ten Hag didn’t perform well next season, I will suggest he should be sacked before the end of the season so that the team can get a better coach that brings glory back to Old Trafford.
I will also say that Ten Hag is not a good coach based on his record at Manchester United. Honestly, his performance is getting worse season by season. If it were not for Manchester United being lucky to win the FA Cup and even the Europa League, they would not have qualified for it. With the set of quality players that Ten Hag has under him, I don't expect these kinds of performances from him. The truth is not that Manchester United lacks quality players, but that Ten Hag does not know how to manage them. If Ten Hag were the type who knew how to manage players, Manchester United would always be competing with teams like Manchester City, Arsenal, and Liverpool.
Many of the players that Ten Hag have signed and they are not performing as expected are quality players who were doing so well in their former teams and played beyond our expectations they was there. However, due to Ten Hag's mismanagement, many of them have declined since signing for Manchester United. If Ten Hag can change and stop having internal problems with his players, it will really help his career.