I am not saying he should be immune to criticism. Am I happy about the current state of his management, and about the development the team has taken over the last half a year? No.
But still let us break down your argument.
1. Over those 60 games, long spells were very good. We also had deep cup runs and won one. All in all, last season has to be classified as a successful one, in no easy circumstances. To start off, this has to be punctuated with a period.
2. About the money spent, most of it was to replace outgoing players. Matic, Pogba, Lingard, Ronaldo, and then De Gea, Bailly, Jones, Tuanzebe all left on free transfers. Fred, Elanga, Telles left for very little money. Obviously in order to replace them or even begin to try to improve the squad, money had to be invested. In that context, 400m really is not incredibly much.
Has that money been invested wisely? Partly yes, partly no, partly doubtful.
- The investments in Casemiro, Lisandro and Onana were necessary and good. Lisandro is quality and a fighter, exactly what the team needed. Casemiro was a great addition last season, a seasoned world class player to upgrade on Matic. The GK position desperately needed action, and we signed the GK of a CL finalist.
- The investment in Antony has not turned out to be good. Malacia, unconvincing but not terrible as a squad player.
- Mount, Amrabat and Höjlund, it makes no sense to judge them, as they have been injured and Höjlund is a kid just getting his first games. Mount is a hard-working, yet creative and forward-thinking midfielder whom just a year ago, in light of his heroics under Tuchel, would have commanded a much larger fee. Will he be the right choice, we do not know yet, but it is certainly not an absurd or wrong transfer to have made.
If you ask me, Höjlund was baffingly expensive, but let us not pretend that the striker market is ripe with bargains, and arguably the state of this position in the squad would have required even more investment.
But there we arrive at the nexus of Ten Hag's management and the overall club management at DoF and CEO level, which is quite clearly where the problems lie.
- The squad is riddled with problems stemming from the chaotic period our club has been going through. Manager recruitment has been confused, opportunistic, ill-timed, and so has been player recruitment. We are paying the price in that the squad is patchy, uneven and has basically been a value- and talent-destroying deadwood generator. Clearly that affects squad building - getting rid of players is unprofitable and difficult, restraining possibilities to get new ones. With regards to that last point, it does not help that the club negotiators have suddenly discovered the need to take a hard line on fees when it would be needed to get rid of a player. Of course, better negotiating and not being taken for mugs is what we all were screaming for, but holding out for more money just out of a sense of pride does not seem intelligent when it keeps us from moving on. But obviously I do not know the fine print and insides of finances, negotiations and FFP requirements.
- The club has attempted a structural shift/update with the position of a DoF and the change of CEO, albeit without bringing in proven expertise from the outside. I was willing, and sort of still am, to give Murtough a chance, but the input into squad planning and its execution from the DoF position is looking very questionable. Signings still tend to be opportunistic (Casemiro and Mount, even if both are quality additions and there is nothing wrong with taking opportunities) and there is no sense of a strategic and shrewd squad building apart from plugging present holes. It seems reactive, and many transfers came very late in the windows.
- In the absence of a proactive DoF line, there is a somewhat worrying tendency to amend squad planning by bringing in players Ten Hag knows. Now, DoF-manager constructs are always difficult to balance, and part of that balance should indeed be to let the manager have a couple of players he favours even if consequent scouting would suggest other alternatives. After all, the manager needs to engineer team chemistry and for that, his judgement and confidence is vital. But it does look like we need more expertise and decisiveness from the DoF side to balance squad building if, as the case of Antony shows, the manager gets it wrong, as can and will happen.
The DoF was installed by the board and works within the parameters set by them. Either he is just an extension of their general obtuseness towards running a football club (having been promoted from within), or rather his ability to act competently, decisively and proactively is hampered by that obtuseness. I am assuming it is a mixture of both, with the weight on the latter.
Because there is the main problem:
The club has been put up for sale, in the middle of Ten Hag's first season. If our owners were not much interested in Man Utd's essence as a football club before, they are now not at all so. The grave situation is that we are owned and run by people who are not invested in the club's future at all. It is not hard to conclude that this also means a reluctance or downright refusal to make consequential decisions and investments into the squad, instead we have been chasing cheapskate loans for anything other than the most needed core additions. That is the hand Murtough has been dealt, one year into his tenure. It also means board, CEO, DoF have no clear future at the club which surely can only add to the sense of disconnect between club, fans, manager, and board.
So are we going to acknowledge the severity of this situation, the hand that has been dealt to Ten Hag, or are we really going to senselessly debate about his sacking? Ten Hag was the right hire, he is a quality manager. He is not the only quality manager out there, but he is not the problem.
To adress your point about his tactics, he seems to be struggling, and I cannot help but feel this is connected to him trying to be pragmatic. Whether that is the right approach, I do not know, arguably the circumstances of the squad are not favourable for the free-spirited and commanding tactical reset we were expecting. But he has shown resiliance before, and he deserves our continuing if critical support. So do our players.
That being said, after the Bayern game, where really there is nothing to be lost, we have four games against weak opponents. Away to Burnley and Sheffield, home to Palace and Brentford. We need 12 points from those, nothing less, and no excuses.
Not even refereeing.