We have targeted the wrong type of players. Who in recent years has been brought in who is capable of playing a high intensity style? Fred and Bruno might be the only two. Sancho was noted for his lack of pressing intensity in Germany, Ronaldo hasn't pressed in years, Cavani at his peak yes, but not this broken down version, Pogba was always a stroller, AWB and Shaw are mediocre in that regard, Matic was physically gone by the end of his Chelsea tenure, Lukaku was only slightly better than Ronaldo in that aspect. Even the players they have brought through don't really have that in them, Rashford does it in spells not continuously, Greenwood was offering nothing defensively from the wing, MCT has his moments but struggles to maintain it.
Elanga getting a run illustrates this, he is not good enough to play at this level yet, but they needed an attacker who could put a shift in and at least attempt to press.
Utd are like AC Milan were when they started to become a retirement home for star names.
Too many passengers defensively, no wonder the back 4 have been a mess this season, there is so little protection in front of them and the midfield are getting slaughtered covering massive space.