Well there might be, though none of our size in Europe comes to mind. But, I would remind you that we live in a whole new world. A world where technology is rampant. Every other day we have stories emanating from the club, players, tweets, magazines owned by players (Rio), speculation, mass media online and printed. No club has had to deal with that kind of pressure on the back of such a change in a club. You might think it's irrelevant but it's not. Every word printed plants seeds of doubt in the players, in the club, in the manager's head. They may not say it, but bad press has a major role to play. The media often use the word "pressure" on David Moyes. Speculating all that could happen to him. When all along he has said the club stands by him.
What the truth is irrelevant, as long as there is bad press, there is bad PR. A club like Man United who have huge commercial interests is affected by bad PR.
I don't think any club has had to deal with these seemingly extraneous pressures in the decades long past. All these things affect the manager, the team and the club. A modern day malaise.