You say that the organizer should make decisions on their own, but then you disagree. Make up your mind. In your tournaments, you make the decisions yourself and send those who disagree far away.
No... I believe that appealing to the argument of the form "I am the judge, therefore I am right" is a sign of weakness (even if this argument is veiled), so I explain the essence and meaning of the decisions made to those who disagree until they either understand or run out of arguments. So far, it has worked every time, even in difficult cases.