Ozzie wasn't really inconsistent, he went from going fairly well straight to flat out BAD since the last game in the Miami series. He didn't even give his LH adjustment a chance which is so aggravating, he dropped it after about 8 games and it went okay at first, but for a while now it's been going completely badly.
And yeah, this isn't Folty just being Folty. It's Folty being hurt. There's a good chance his bone spurs barked again after two rehab outings and he's not being truthful about it. He made major changes so far this year. Why would he outside of one reason? It was shown clear as day there was only 1 way he could succeed and instead of doing that, he's spread out his pitch usage, and for example, his sinker stinks but is back up to 24.8% usage. Only reason for that would be to try to work around not being your best self.