I think Manchester United were labelled as a failing team in the first couple of games in to their season but the vital win against Liverpool set them back on the road to recovery. Ten Hag made a huge decision to bench Maguire and that somehow kick-started their season with Martinez and Varane occupying the central defensive positions.
They won the Carabao Cup and are still in the semi-final of the FA Cup, the quarter-final of the Europa League and are joint 3rd in the Premier League therefore they have made progress.
Any body who understands football will know that Ten Hag was a good coach. The way Manchester United played even at the beginning of the season when they were losing shows that Ten Hag knew what he was doing, but I must confess I thought he would need more time to get things right. I felt this way because watching the Manchester United players play you'd see they struggled to execute things on the pitch exactly how Ten Hag wanted. His concepts were alien to them.
Take for example, Ten Hag is a manager that loves his team to always be on the ball by releasing it very quickly to their teammates. United players struggled with this because they were not used to that style of play, but look how quickly they all adapted.
There is still a lot of room for development in that team and a lot of positions that needs to be filled by the right players, but from what Ten Hag has done so far, we can say that he might be the coach to return Manchester United to her glory days.