Now getting to the second half of the match, Ten Hag made a wrong substitution, by bringing Rashford on for Cristiano Ronaldo, if you look at the game Sancho wasn't really part of it as he should have been substituted, and since Ronaldo served as a number, that through Ball from Rashford to Fread would have been converted if it was Ronaldo.
Every one has a different view, I don't know if it's wrong or not. Indeed Ronaldo's substitution to Rashford did not result in a goal. But I think Ten Hag has fitness reasons. Man United have a busy schedule, so it needs to make a substitution. I think the choice is just Rashford and Martial being injured.
Of course I didn't expect a draw either. But right now I understand they're in a period of change. They can't change in just one night. Ten Hag needs time to make Man United better. Although he has spent a lot of money, he needs time.
Even if the player's fitness is good, it is somewhat difficult for any player to perform full 90 minutes. So since Ten Hag has the opportunity to substitute players, he should give Ronaldo a chance in every match. Ronaldo is a very talented player. But he is not in good form. He will probably get a chance to return to form if he gets a chance to play consistently.
However, for the weak performance of Manchester United, I will blame the weak midfield of United. United have plenty of talented players in attack. But since the midfield is weak, the attacking players are also not able to play well due to lack of cooperation from the midfielders.