I totally agree with you, Man United have a problem with confidence, the majority of the players are playing below standard. It takes motivation to get Man United players to find their best form, and I see the arrival of Erik ten Hag as having a positive impact. Many players are more excited to face the competition next season, one of them is Marcus Rashford, who decided to fight for a position to become the main player for Man United.
Moreover, Erik ten Hag himself said that Rashford was included in his plans. I would love to see Man United next season can compete with other big teams to win the Premier League trophy, I believe Erik ten Hag is capable of that.