It's a good job that everyone else in the game is polite and civil to each other at all times. Coaches to players, fans to coaches and players and referees, fans to each other.
Literally the only people in the game to experience a bad word said to them is the referee and it hurts them every time because nobody in the wider world ever hears anyone express frustration towards them. Poor little flowers
Perhaps you should try being a referee yourself. It's a thankless task and if everyone took the stance of abusing them for 80 minutes game in game out, I'm sure there wouldn't be many willing to do the job. And without them we wouldn't have a game.