Orton displayed his true colors for all to see when he screwed the Cowboys over using a phony excuse to do so. He had no more intention of retiring than the man in the moon. Blatant dishonesty makes it's own revelation. His dislike for Romo strikes me as jealousy, pure and simple. He probably fell for all the negative conjecture about Romo being inadequate and decided it was his big opportunity to replace him.
When that didn't work out, the jealousy kicked in. Perhaps all the BS about the "power struggle" was nothing more than a flimsy excuse for his dissatisfaction with being stuck in Dallas as a backup. At any rate he's gone and thank God for that. Here's hoping he finds his Valhalla in Buffalo but somehow, I'm doubting that'll be the case. Serves him right, I'd say.