I agree with the entire post more or less, except for the point where you say we're operating in the right way, where I feel we need a DoF.
Our fans have lost the ability to think rationally and anything we do is met with moans and groans. We sign a superstar- and our response is "He's just here for the money. How many times have we tried this in the last few years and this tactic has failed miserably". We sign a youth player:" Other teams are buying from Bayerns and Madrids, whereas we are buying from Championship sides". We sign a free agent/get a bargain and that is met with "Glazers are just trying to save money."
We gave managers the freedom to sign players and then we abused the club of not thinking for the future, not having a long term plan. When Ed refused (and rightly so) the transfer exits of Shaw, Pogba and Martial and arrivals of Willian, Boateng and the likes, we abused the club of interfering in the manager's job.
For someone on the outside, it's near impossible to understand what our fans even want. We've become so obsessed with hating the club and the owners that anything the club does, a player or a manager does is seen with skepticism like "Donating 1% of salary for Common Goal- He's just saving tax".
Look at Ole's example. For the first time since post Fergie, the manager is signing players looking at the long term. The players who will be here for years irrespective who the manager is 10 years later unlike signings of Matic, Ibra, Schweinsteiger, etc. who were short term fixes. At the very least, the side he'll leave behind is not going to be looking at a major overhaul because half the side is in 30s or on the wrong side of the age curve.