Sir Alex himself said we need to give managers time. Since then we have had Moyes, Van Gaal, Mourinho, Ole, Rangnick and now Ten Hag. That is 6 managers in 11 years.
The management merry go round at this club is probably the main reason as to why the club is no closer to winning the league now than 10 years ago under Moyes.
The continuous replacement of managers clearly isn't working and you and many people think the best way to get back to winning the league is doing the exact same thing that hasn't worked for 11 years. No manager at the club has been further than 2.5 seasons.
Maybe let the club try a different approach for once and maybe things might change in 3 years time, giving a manager a bit more time than 2 - 2.5 years. If not then get a new manager. But for once the club are giving a manager more time and backing him with a proper football set up. Let them support the manager with a proper set up and see what happens instead of just constantly complaining. At the end of the day ETH is the manager now, just back the manager and the club while he is here. because yours and many others moaning isn't going to change the decision.
Remember the saying ' The definition of insanity is doing the same thing over and over again and expecting different results'
That's completely normal turnover for managers at top clubs. Let's have a look at some others (all CL winners of the last decade):
Manchester City had 2 in those 11 years (Pellegrini and Pep)
Liverpool had 2, just signed the 3rd (Rodgers, Klopp, Slot)
Barcelona had 6, just signed the 7th (Martino, Enrique, Valverde, Setien, Koeman, Xavi, Flick)
Real Madrid had 7(Ancelotti, Benitez, Zidane, Lopetegui, Solari, Zidane again, Ancelotti again).
Bayern München had 7, signed the 8th (Pep, Ancelotti, Heynckes, Kovac, Flick, Nagelsmann, Tuchel, Kompany)
Chelsea had 9, signed the 10th (Mourinho, Hiddink, Conte, Sarri, Lampard, Tuchel, Potter, Lampard, Poch again, Maresca)
So the amount of manager changes can't be the issue. Some clubs had a high turnover, some didn't, they all won the CL. The issue never was that United sacked a manager, the issue was that United always backed the manager (which you also demand). United never build a squad for the club, but always for the manager. And then they looked for a new manager for the club, not for a new manager for the squad they had. Every change of a manager turned half the squad into "deadwood" over night and created the need to replace a lot of the players, which was never completely possible and resulted in a weird squad.
United needs to stop backing managers. Back the club. Build a cohesive squad of players that fit each other and sign a manager that fits this squad. Whoever doesn't fit or doesn't deliver the expected performances should be replaced. No matter if it is the manager, a CB, someone in the medical staff or the tea lady. Yes, the manager is one of the most crucial people in such a setup. But if he isn't replacable without interrupting everything, the club setup is wrong. This has been the case for to long and people hope for INEOS to change that for the better.
And whenever someone sees that EtH doesn't pull his weight or doesn't give the right input to the team it's absolutely fair to call for him to be sacked, for the better of the club.