By Luc Olinga Billionaire Microsoft co-founder laments the direction the world is going and makes big promises to change the game. Bill Gates is sad. The co-founder of software giant Microsoft (MSFT) – Get Microsoft Corporation Report turned philanthropist laments the direction the world is heading. In a series of tweets, Gates lists what he calls “setbacks” over the past two years, as if to say that our world is regressing on so many issues. “Several huge global setbacks over the past few years have left many people discouraged and wondering whether the world is destined to get worse,” the ph…