Brett Favre
The Green Bay Packers know all about long-term dramas involving star quarterbacks. Favre was their starter before they drafted Aaron Rodgers. He also helped them to a Super Bowl win and led their plays for a generation. Eventually, he flirted with retirement and the franchise opted to move on.

But it annoyed Favre when the Packers told him that they didn’t want him anymore. He expected to unretire and rejoin immediately as their starter. They said that they were all-in on Rodgers and traded Favre to the Jets. The disgruntled Favre finished his career with the Vikings and never forgave Green Bay (via Sportskeeda).