Man United's biggest problem is they struggle to adopt a new strategy and it seems like not many of their players can immediately fit into the new system. The most obvious is their strikers who are stuck in scoring goals, so that just to score a goal they have to rely on their wingers, midfielders, or even their defenders.
Actually, the solution is quite easy, that is selling the two strikers and signing a new striker who can really make a contribution (eg. Osimhen). But it is not easy for Man United to do all that because their reputation is not good (so it is difficult to just sell players) and they no longer have funds left, so it's pretty difficult if they want to sign a new striker.
I try not to believe in the curse, but every time a new player is brought in by Man United, their performance will decline and after he is sold or loaned his performance will come back to life. There have been many examples and this cycle continues. So this is no longer about the players but the people behind the management of Man United itself including the most important coaching staff. The most reasonable solution and the final solution is to sell the club to someone who is ready in everything, especially in terms of finance. Because so far the Glazer Family has only used the fame of the Man United name for their own interests, not for the interests of building the club.