Look at any game he has played alongside Rooney and you will see Rooney openly berates him. Under Moyes Rooney was given much power. Is it unreasonable to assume that there is some form of correlation?
Look at some of Nani's best matches. He does things that are quite amazing. Rooney does not like being second fiddle and Nani, at least at one time, had the potential to be great.
we will know in time. Until then keep laughing.
Why would Rooney not want to be second fiddle to Nani when he was second fiddle to van Nistelrooy, C. Ronaldo, Berbatov, and van Persie?
Even then, it's strange to think that Rooney can have so much power that he can do whatever to Nani without his teammates also being affected by this.
What has kept Nani out for so long are his injuries. He's had so many injuries on his legs, and I believe this is the main reason why he doesn't play as much.