For my money it is still on Reinsdorf. This guy led the group that bought the White Sox in 1981 for $19 million; today the franchise is valued at $1.8 billion. And yet he continues to cry poor and act as if he is in Kansas City rather than the third largest city in America. He blackmailed the state into building him a new stadium (where attendance the first 3 years averaged 2.7 million), then led the lockout in 1994, which antagonized all of the fans and probably cost the White Sox a chance at both the pennant and World Series. He then wondered why attendance fell off for the next 10 years, until the 2005 world champs. This year, for all his supposed crying about attendance, the mediocre ball club drew over 2 million people, the first time they hit that number since 2011.
This is the guy who let Dave Dombrowski walk in favor of Hawk Harrelson. It is the guy who fired Larry Himes, who only drafted Jack McDowell, Robin Ventura, Frank Thomas and Alex Fernandez in consecutive years, as well as trading for Wilson Alvarez and Sammy Sosa. Reinsdorf is the same guy who put Hahn in a can't win situation by keeping Kenny Williams around. And then, the brilliant move of overriding his GM by bringing La Russa in.
Hahn is not a good GM, but the problem is Reinsdorf. Forty years of him is the same penance White Sox fans had to endure between the 1919 Black Sox and the 1959 AL champs. Sell the team!!!