Lmao, MU isn't his club.
His first club was Sporting.
And he became most famous while playing for Real Madrid. And he achieved most of his titles here.
By your logic, he should have returned either to Sporting or Real. Otherwise it's a betrayal.
I think when player have few years left he want to win something before the retirement, but instead CR7 ended up in a disaster club, probably the worst one out of big 6 (LFC, Tottenham, City, Chelsea, Arsenal and MU). It's impossible to win something with current MU, because owners are retarded dumbfucks, who doesn't care about the results, only about media and money. And they doesn't care about the ways to make this money, which is also bad.
I bet that if they could they'd sell MU to arabians and then MU would be no different from City, lol.