This took place a few years ago, but I think y'all might enjoy it.
I used to ref for an adult co-ed recreational league that had a variety of sports. I reffed almost every sport they offered during a particular season. I'll be honest and say I had a bit of a short temper, especially when it came to players arguing the rules with me, so a few times I'd get in yelling matches with them before ejecting them. That said, on this particular night in volleyball, everything was going fine. Then came the last game of the night. There was a particular volley where someone borderline-carried on a set, but I let it go on. Shortly after, I'm getting yelled at by the other team saying I'm playing favorites. My defense of “I'm just here to call the game and collect a paycheck” didn't defuse the situation. The next morning I get an e-mail from my supervisor saying his boss got an e-mail from the team last night about me “playing favorites”, and that his boss and himself “weren't pleased”. This bothered me a lot, as I wasn't even given a chance to defend myself, so I fired back “You're not pleased? Neither am I. This is my two week notice.” I could almost hear the sound of brakes being slammed when I got the reply to that, something akin to “Don't do anything too hasty. Think about it over the weekend.”, but my mind was made up. Two weeks go by, I train my replacement on how to set up, and I was out of there. He's since left the organization, but to this day they still have issues finding people to ref. The organization has contacted me a few times, but I said until they pay me $50 an hour, there's nothing to discuss.
TL;DR: Volleyball team thought I was playing favorites. Supervisor was ( I felt ) condescending to me when e-mailing me about it. I put in my two weeks, and 5 years later they're STILL having issues finding people to ref.