Scott Pioli gave Matt Cassel $46.5 million to be one of the 3 worst quarterbacks in the NFL over the duration of that deal.
If nothing else, he deserved to get fired because of that decision. Throw in the amount of ticket sales and lost revenue due to fan apathy, and Scott Pioli cost his boss about $60+ million with one stupid !@#$ing decision alone. Then he doubled down on said decision.
If you can't draw a crowd, draw dicks on the wall.