Guy Ritchie is the worst screenwriter in the world, but, to be fair, he is not the worst director. He is only the worst director of the people who actually get to make movies. As we speak, there are human beings walking the Earth -- perhaps as many as a half dozen of them -- with less directorial talent, but they've been safely diverted into other activities.
Perhaps the best use of "to be fair" I've ever come across. Burn a candle for never having your name in that sentence.