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That is very correct, I agree with you that the problems experienced by Manchester United are very complex, so any efforts made will lead to setbacks. A comprehensive reform of the team is needed, so that everyone achieves harmony in thinking and taking a stance to build the club. Quite curious at what point management will provide a guarantee for Ten Hag, even though we know Ten Hag is an unlucky coach and not a bad coach.
I think the limit of tolerance given by club officials towards Ten Hag is the UCL group phase, and if he fails to get United to the last 16 then his career will soon be over. It is true that with Ajax he can achieve success, that is what makes European clubs look at him if in the end Ten Hag and United end their cooperation.
The depth of Manchester United's squad is a problem that must be resolved by management. Some of the main players do not have competition for the positions they occupy, so coaches are confused about rotating these players with better players. This results in the growth of egos among players so that sometimes they do not play as expected and can even be detrimental to their own team.
For one position there should be two players with good quality. They need to have competition to be a major player in the line-up, but Manchester United have had none so far. Even if Ten Hag rotates his main players with reserve players, then Manchester United will be no different from an ordinary team.