I actually felt concerned last season that they were beginning to get on the right track with a some what successful manager who didn't necessarily seem that his best days are behind him like Mourinho or LVG. Each manager is set up for a loss, it doesn't matter how much they spend, the fans think the owners are not investing. Then after the fans, Neville and co complain about not enough money being invested, the manager then gets a tonne more money to buy on players thinking they can buy success.
There are few teams that can buy ready-made world class players. Man U think they are but as such they end up paying the fees, the wages and the length of contract that world class players command. This keeps their fans happy until they find out that their signings aren't world class but it becomes rinse and repeat with owners apparently not spending enough, so they spend another tonne on players who aren't good enough.
I genuinely think they would have had their biggest protest yet if they were in our position and signed Endo however that is a huge difference between the clubs transfer policy. Right now that transfer looks like a shrewd move, a show we can't be bullied for silly fees and looks to be a good enough stop gap, potentially really good signing. Man U would either sign a player for silly fees as the fans demand it or miss out in which the manager gets credit for working to a stringent budget.