United's biggest problem is their captain, closely followed by their 'star' forward Rashford. They have the wrong mentality and yet get guaranteed games despite performance. The second biggest problem is giving contract extensions to underwhelming players to protect their market value.
If United finished 6th while playing football with an actual coherent philosophy, 99% of matchgoing fans would be happier than the current XI getting 4th.
Hannibal, Mainoo, Garnacho, Hojlund, Diallo instead of Eriksen, Bruno, Rashford, Martial, Sancho. That's not to say the youngsters would be world beaters, just that the current crop of undroppables need a kick up the arse.