It seems that most of the criticism here of Ole consists of broad generalizations. He's not improving players. His tactics are ridiculous. The team is going nowhere. Time for a change. With all the money spent (typical claim of 90 million last year) the team should be playing far better.
Some details. The net expenditure last year was 65.5 million. See:
https://www.transferleague.co.uk/ma...sh-football-teams/manchester-united-transfers
If one accounts for the loss of Herrera (conservatively estimated at 40 million) the net investment in the team was 25.5 million. Quite a bit less then the expenditures of their major rivals not facing a ban.
Two proven PL outstanding players lost, Lukaku & Herrera and two proven PL players brought in, Maguire & AWB along with one proven Championship League player, James. Hardly a major rebuilding effort.
The actual rebuilding has had to rely upon Ole's management skills upgrading players.Ole has had remarkable success in this area. Six of 11 starters have made significant improvement.
Lindelof - has gone from flop to reliable starter.
Williams - reserves to outstanding performances.
Fred - from total flop to improving starter.
McTominay - substitute to essential starter.
James - brought in to provide some depth off the bench and has risen to essential starter.
Martial - from disinterested bystander to focal point on the attack.
That's 6 out of 11. Who could have done better and how would they have done it? One could even make the argument that AWB has improved with signs of addng offense to his defensive prowess. And, waiting in the wings are Greenwood and Tuanzebe.
There is also criticism of Ole's tactics. This squad is paper thin. When there is injury, the bench is made up of elderly or academy players without experience. A decision was made not to replace Herrera and not to replace Lukuku. So when Martial is injured, the attack is decimated. When Pogba & McTominay are injured as now we are forced into a midfield of Fred (improving but not there yet) and Pereira. Without a midfield it's not possible to attack and it really stretches the defense. It doesn't leave much room for fancy tactics.
Ole is forced to play the hand that was dealt to him. The team has not received the kind of massive rebuilding through transfers promised by Man Utd management. But what he has done is to play the cards he has very well gaining significant improvement from the majority of his starting players.