The Joanna Claudia fight was another robbery. But hindsight 20/20, the GSP Hendricks fight was probably the biggest travesty of all time, considering how high the stakes were: GSP's first real well rounded complete opponent, title fight, D1 champ vs UFC champ, GSP's last fight at WW and then how he never rematched and retired.
I love GSP, stand up guy, great martial artist, UFC GOAT imho, but he 100% lost that fight. That was the one fight that I felt dirty to be a part of MMA and remembered the reasons why I hated boxing judges so much. What is the point of fighting if the clear winner does not win (cough cough Canelo)???