Let's not act like Aizen was never praised when he was playing the role of good guy, too. At best, we'll just get one smug, "I told you so!" when the battle ends.
Otherwise, I wouldn't be surprised if he's some orphan child of the spirit king and part of his crusade is just sorting out missing daddy issues. Could maybe even take things a step further in insinuating the SK "gave up" the powers Aizen has in order to prevent Bach from getting them in a distantly seen future. But why Aizen thought the SK a tyrant or whatever is still totally up in the air.