If he was injured and looking for an excuse he could have said something days ago, no? Have you heard anything, cause I haven't and I'd assume that I would have since I live in PHX and hear quite a bit of news.
Last year he was legitimately hurt in the Lakers series, no?
I don't recall hearing him complaining about the things you say he complains about. Its fine not to like a player but you're overstating it quite a bit IMO to say he blames his performance on injury.