For me, the worst manager of the QSI era when you consider the resources and team he had available. The fall-off statistically once he came in was almost immediate and just kept dropping until the last couple of weeks of a season that was already wrapped up and with no stakes to it. This team without Mbappe, might not even have won Ligue 1, and at the very least would have been a very close win which is unacceptable either way.
He belongs at a mid-table club, that's his level. He can do solid things without too much expectations or star players to deal with. As soon as expectations come in or he has to manage a dressing room full of egos, he seems to fade away. His media interviews were so defensive and showed you someone who's weak mentally and can't hack it under the microscope. Big clubs with a lot of media attention should steer well clear of him and he can make himself a nice career managing clubs like Tottenham or Athletic Bilbao, and he'll probably over-achieve with them, but he's simply not cut out for the high-pressure environments IMO.