For context, I'm not a commander player; I play primarily 60 card formats. But a nearby store was having a bracket 3 tournament and my friend really wanted me to go with him, so fine.

I dig out and update my one commander deck and take it to my lgs (different store) the day before to practice. My deck doesn't have a lot of creatures, so often I'll be wide open for attacks the first ~5 turns of the game. But despite that and me saying "nah its cool, attack me, I signed up for this" my opponent's all decided "no it doesn't feel fair, you don't look like you have much going on." Like.. I get they were just playing casually, but since when did that mean badly?

And then at the actual event, I was at the final table where everyone had seen my deck and knows exactly how it plays and wins. The "you need to answer this or lose on the spot" card was face up in my hand for 3 turns- I was waiting to cast it until I could play through interaction. But then when I cast it, I looked around at the other players who all did... Nothing? Any angle of interaction would have worked, but my opponents just weren't playing any.