Manchester United management has changed coaches in the last few seasons so there is no reason to look for a coach and expect instant achievements. Everything needs a process and in my opinion what Manchester United management is currently doing is correct.
Now Ten Hag only needs a few additional quality new players to fill the squad and I think Man United under Ten Hag will be much better next season.
When you team has a good defensive players but lack attackers, they will suffer in many of their matches and that is what I see in the situation of Manchester united, they need new attackers. Just imagine if a team doesn't have a good attackers, when they can't make a single shot on target for 45 minutes Ina tough match, there is no way there attackers wouldn't get tired, that's why many times they more often of defensive games instead of attacking games.
They should invest in a one strong attacker particularly a striker who can give them a strong hold of any defenders or build two wingers and one tapping man just like Guardiola did with Manchester City, he used Haaland, Fodin and Kevin to distribute attack on enemies and it's working for him when they need them the most, with such strategy Manchester united don't need to spend money on a new coach if that's what they want but a new coach will go a long way.