Not sure i understand this take.
Mourinho arrived and we signed players for close to €200mill, not to mention the overall cost of Zlatan with his wages. We brought in Zlatan,Pogba, Mkhi and Bailly. Following season we spent similar amounts on bringing in Lukaku, Matic, Lindelof, and Sanchez. We did our outmost to sign Antoine Griezmann, at his request. We did our best to ship out whoever he wanted gone. We tried signing Perisic, but he didn't want to leave Inter at the time (according to himself). The not longer special one was backed to the hilt.
The higher ups only started to put their foot down on Jose's request at the end of his second season, and rightly so, after he wanted to replace his own signings with even more expensive players because they turned out to be rather crap. Rashford and Martial were enjoying a very good season, where they were pushing each other for the left wing spot, Jose was dead set on signing Sanchez in january and we shipped Mkhi, an expensive dud, the other way + a transfer fee, making Sanchez one of the best paid players in the league. He then instantly made Sanchez his first choice on the left wing, where he was a disaster for us, and Rashford and Martials form collapsed after they were reduced to fighting for the backup role to Sanchez.
Bailly was a failure, Lindelof wasn't very good, both of them expensive players, so now Mourinho insisted on Maguire, who would've easily cost more than he did when we signed him the following summer, who we could've signed for feck all when Hull got relegated and Mourinho first walked in the door and signed Bailly for close to €35mill (Maguire was signed for £12mill that summer). Mourinho's relationship with Pogba was getting worse and Lukaku wasn't exactly looking cheap either.
Mourinho was afforded support until it became obvious that he was a part of the problem and not the solution, which is the same for the vast majority of managers. Ten Hag, if he's still the manager, isn't going to be offered the same level of support, simply because there's going to be a lot more scrutiny, which is only natural on the basis of our performances this season.
Also, Willian was a fecking shitshow towards the end at Chelsea. It would've been an extremely expensive mistake to bring him to United, one that would've been difficult to rectify. Thank god we didn't sign him.