Sure everybody is biased to an extent. We're never gonna be able to get away from that. I also believe that there was a little bit of biased-judging going on in the Traya vs Revan Kaggath, perhaps the Vitiate vs Sidious one too. But both sides to both of those arguments were full of debaters who made excellent points. Those battles could have gone either way. Like you said: everybody is biased. This does not exclude Beni. Take a look at youself. Put youself in Beni's shoes. Who do you think would have won? Obviously you would have thought Sidious. Then guess what? You would have been picking him from the start and would have "made up your mind" before
the Kaggath had started. You would have also been a biased judge. So would I.
But I don't know why it is so hard for you to believe that we (people arguing for Vitaite) made a convincing argument. Accept it that these battles could go different ways and that not everybody is gonna see everything the same.