I don't see him being able to create a good relationship between players, or players and himself. Because since he arrived there have always been rumors of not wearing clothes coming from them, which was worse when Cristiano Ronaldo was still around. When he did interviews, on several occasions he also blamed players more often when they couldn't win. The coach shouldn't do that, because the coach should be able to look after the players. Even though it is true that they are the ones playing on the field, blaming the players is still unwise.
Sancho played well when he played at Borussia Dortmund, whereas when he played for Manchester United, he couldn't show that. Will he be able to play well after he returns to Manchester United? that's still a question. And if he can't show something good after returning to Manchester United, then I can say there is something wrong within Manchester United.
I agree with everything that you said because a good coach shoukd not always blame his players for their poor performance but instead he needs to encourage and motivate them so that they can do better next time. It was clear last season that United poor performance was majorly from Ten HG side but the players also contributed to it too.
If Sancho did not come up with his best performance while in United, it means that he cannot fit into Eric Ten Hag game tactics and that will be another criticism from the fans. There are a lot of improvements currently and that should show positive effect on the team.
It should be like that, but Erik Ten Hag didn't do it. And even for me, a coach must be ready to defend and accept the mistakes made by his players, let them talk about it internally and don't say it in public. In public, the coach must have a chivalrous spirit and defend his team's children, even though it may be that their students are really in the wrong. Great coaches always do this, defend their players.
They have an internal that will not be touched by the public, so they can evaluate everything more privately. And when the situation is closed they can take firm action against the players who made the mistake. As coaches, they not only think about what is important for the team, but they also have to protect the good name of their team. Likewise with players, they have to look after each other, including protecting the good name of the coach who handles them.