#6 Muhammad Hassan
WWE went way too far with the Muhammad Hassan character. It even ended the wrestling career of Mark Copani (the man who played Hassan).
After a controversial angle where his sidekick Daivari was "sacrificed" and a group of men clad in black carried him off, UPN stepped in and told WWE to get rid of the act (WWE simply overstepped some serious boundaries here).
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
Hassan had his last match with the Undertaker who gave him a last ride through the stage. Hassan was then sent down to developmental. Once there, WWE gave him an ultimatum: change your gimmick or be released.
Needless to say, he refused to change it. Hassan’s push to the top was now gone and he left wrestling completely to become a teacher.