I don't think Postecoglou's a fraud. He's just in honest pursuit of a brand of football with a pretty low ceiling in this league.
The way they play is too high risk to achieve more than a few purple patches and a top four berth in a league with teams like us or City.
When we fail it tends to be because our football relies on perfect conditions (few injuries or form issues) and near perfect execution. When Ange's Spurs fail it's also because their whole approach will never rule it out.