I'm honestly not blaming anybody. On the managerial front, the man is obviously building the team for the future, but he's being judged by people expecting instant success, which is a complete misunderstanding of how these things work. Van Gaal is notoriously difficult to work with, and everybody knew that all along when we was hired. But 2-3 years down the line, when all the young talent he brought - Shaw, Memphis, Martial - will start ripping ****, everybody will suddenly realize that maybe crazy uncle Louis actually knew what he was doing.
And when it comes to the players, who can you blame really? People who got injured? Because otherwise everybody is performing more or less up to their expected standard, and younger players are inconsistent, which is also expected. The only exception is Rooney, but he pretty much went and declined beyond repair. Can't really blame the guy for aging, can we?
The biggest problem is obviously Rooney, there's zero doubt in my mind that if you've had another "250k a week" striker, you'd be top of the table. Its a bizzare sort of situation where United is an elite club that doesn't have even one elite word class outfield player. Because who do you have that other teams are afraid of? Nobody. Back in a day when opposing manager prepared before the game, he had a headache of a century because there was 5-6 people he had contain to turn around the score if left alone for a second.
And you can't blame the board either, because what can they do really? They have the money, they're willing to spend for superstars, but if nobody is willing to sell, you need to develop your own superstars. That's always hit and miss, and it takes time and patience. Di Maria was one prize that you managed to grab, but after robbery it was obvious he doesn't want to be there, or more likely, his wife doesn't won't to be there, which is even worse.