It's not to say judges, refs, umpire etc can't be wrong. Having played sports my whole life I can positively say I have had poor officiating. It's the nature of the beast, they are human and make mistakes.
But back to bodybuilding. If someone gets onstage and is clearly more symmetrical, striated, conditioned, holding no water, proportioned properly compared to the guys standing next to him he WILL win. If you come off stage and complain on judge biased decisions, favoritism etc then in my opinion it's your fault for not blowing the competition out of the water and leaving the judges no choice but to give you first. You should enter EVERY competition (hell even things in life) with the intention of blowing your competition out of the water and making them look like amateur children. That's how I see it wether bodybuilding, work, relationships, even playing a game of football with the bros.