I don't mind at all if people get angry over a shot or many shots. That isn't a big deal. If you mean being negative and angry the entire round then sure. It's going to be tougher to simply have fun and play your best.
I think the biggest point is. Not letting their attitude effect yours or your own play. Ideally you should be able to play your best with the most negative players. Might be tougher, but in the end it is on you.
Kinda like we do here when you post things?
I kid of course. This is why I don't like playing tournies much anymore. For me the game is enjoyable when i am out in nature enjoying the outdoors and the flight of the disc.
I don't feel the need to prove that I can tolerate someone else's nonsense during a game just so I can win some $$ that barely covers my expenses for said tourny.