After the Detroit Lions lost to the Washington Commanders in last year's playoffs, offensive coordinator Ben Johnson pretty quickly left to become the head coach of the Chicago Bears. With how that loss went, a strong section Lions' fans leaned into the idea Johnson's focus was elsewhere when it shouldn't have been.
Leaving to become the head coach of a division rival adds a significant layer to how Lions fans feel about Johnson. Add in what he said upon arriving at Halas Hall, and Bears' defensive coordinator Dennis Allen later revealing when Johnson first contacted him about possibly being on his coaching staff, and Lions' fans have plenty of fuel for their disdain won't ever be assuaged just by their team beating Johnson's new team.