There have always been cases of teams helping each other a little here or there on challenges, and for the most part, The Amazing Race has seemingly been okay with that.
There were times in which really bizarre U-turn decisions were made that were clearly based on personal feelings.
There were legs in which every single team, save one, worked together to eliminate one team.
It was really frustrating at times to watch as a viewer and completely removed almost all gameplay and intrigue.