They all spent virtually their entire careers working under a man who was a total one off, his methods would never work anywhere else. They never saw anything else and theyre trying to replicate something which cant be replicated. The managers have all failed and the pundits are (with a couple of exceptions) hopeless.
You'd think they'd learn something though. Hughes was decent at one point, but still far from being a top manager.
Look at Xabi Alonso. His dad was former pro. He played under Rafa, Mourinho, Ancelotti and Pep. He seems to be drawing from all of these experiences to become a very promising coach.
Rooney played under Moyes, Ferguson, LvG and Mourinho (briefly). That's good mixture of managers to learn from. But maybe he just isn't intelligent/articulate enough to get his points across. Most former top players really seem to struggle with coaching players who can't do things that came easily to them. I bet Rooney is in this bracket. Roy Keane definitely is.