Why the change of heart, Clay?

Tmz has stated that Clay Aiken has recently been dissing the show that made him famous, American Idol. He stated that the show was only good for seasons 1-3, when the contestants were "real". He also stated that Adam Lambert's horrific version of "Ring of Fire" made his "Ears Bleed".

I can kind of understand what Clay said about the show. It seems like it has been getting kind of old. However, I'd extend it a year and say the show was best for seasons 1-4. I also wouldn't dis a show that is the sole reason for my fame if I were him.

Another thing, it seems really ironic to me that he would be dissing Adam Lambert so much since he recently went to the Idol set to try to talk to him about collaborating on a duets album. Hm. Could it be jealousy? Or is it just Aiken's way of fighting back since he was denied the right to talk or go anywheres near Lambert on the show?