I dont think Capello is past it as a manager at all, I just think England players are too spoilt to be managed by a disciplinarian, which is also probably a big part of the problem of why they are such a pile of wank most of the time. I think Capello would have whipped them into shape eventually, but it is not an easy thing to do to a national team, given how little time you spend with the squad.
As for England, of course Rooney isnt the whole problem. He isnt even the biggest problem. Unfortunately, when you are the "talisman" of the team, you are held to a higher standard and expected to lift everyone else. And when you dont do it - when you are shit by your own standards, you get more shit for it. Its another back handed compliment, the same as the fact that United get more shit for things (diving / getting favourable decisions / "Fergie time") that are not really limited to us at all: when you are the best there is more focus on you and so if you get a decision go your way it is more noticeable than when it happens to others.
United get a disproportionate amount of negative coverage at times because we are the best team in England (taken over a longer term time horizon).
Rooney gets a disproportionate amount of negative coverage at times because he is the best player in the national side.
And I think that is quite justified to be honest. Rooney should be taking more responsibility and lifting the team. He has been pretty rubbish for a long time for England, and while at times there have been mitigating circumstances, he does need to have a look at himself and work out if he wants to / is capable of doing something about it. He is in danger of completely wasting his talents as far as his international career goes. Not that many of us are too bothered about that, if he delivers for United. But most footballers do care about playing for their country: if he does he hasnt got too many more tournaments left in him before he starts to decline.