By Daniel Kline Burger King has a Whopper of a problem that the Whopper cannot fix. Back in 1983, Burger King’s Croissan’wich seemed revolutionary. At the time, much like now, McDonald’s (MCD) – Get McDonald’s Corporation Report dominated the fast-food breakfast market with a very simple menu. It had the Egg McMuffin, pancakes, the Big Breakfast (pancakes, eggs, sausage patty, and a hash browns), and not much else. From its national launch in 1975, the Egg McMuffin stood tall as the clear winner in the morning despite it being built around Canadian bacon, not actual bacon. The sausage and baco…