Gurgen Their problems are not coaching related. They are simply not run as a football club.
Spot on. Woodward set the tone for the entire organisation when he claimed that there's no connection between the successes of a football club on the pitch and its profitability off it. That was the death sentence for their football operation. United haven't been run like a club for decades now: they've been run as a company with everything that entails, and they try to rehabilitate the team the same way a company go about rehabilitating their corporate image.
It's fine for Rooney to have opinions, and he's quite right in what he says above, but he himself was part of the problem towards the end; that's how long these issues have existed! He was already fat and old and over the hill by the time van Gaal took over the club, and yet they gave him a new contract, more playing time, the captaincy. I didn't see him leave those millions on the table and walking away, so why would someone like Casemiro?
No manager is ever going to solve this because the issues are related to the people who make the decisions, and they keep signing marketable profiles instead of genuinely good players. The problem of course is that a football club is not a venture capitalist scam: if the players fail the club actually ends up going bust. All you're left with then is a beanpole who has a great youtube compilation but no actual output on the field, and two strikers who score less than our centrebacks. That's how you finish 16th.