I confess. The entirety of my dislike of Donald Trump spawns from his role in the collapse of the United States Football League, as detailed in an ESPN "30 for 30" documentary.
The league featured Oklahoma's only non-collegiate professional football team, the Oklahoma Outlaws. Its collapse removed us from major-league level sports until the post-Katrina sojourn of the Hornets and then the Thunder.
OK, sure, the Outlaws' owner had already moved them from Tulsa to Arizona before the USFL folded, but that's because he was a dude who figured that having a lot of money meant he knew how to run things even though all it really meant was that he was a dude with a lot of money. And from whom do you think he learned that lesson?