Look, I've got a fair bit of time for Cav (obv not as close a connection as PF), but..
Don't care what's happened before, or afterwards, but he's known for ages that he's had the target on his back - that he's the man to win the road race because he's racing for GB and one of the best sprinters ever, in the London Olympics (yes, the track didn't suit him, but still...)
For him to whinge about other teams not helping him out is silly - sorry Cav, but you're the marked man, why would anyone want to help the person who is most likely to beat their own teammate? He got stuck into the Aussies for being negative - why should they help him catch up to the breakaway which included one of their own team? They're not wearing Sky guernseys now...
He was the obvious man to win, and people aren't going to let that happen - they'd rather let a lucky dip go down than help the best rider win come the Olympics. Simple.