You must understand that some people have been playing here for years.
To be elitist, arrogant, impatient, rude and demanding helps some people to cope with the fact that they themselves wasted all their own time on this meaningless game for days on end, time which they could have used to achieved so much irl by now. Some people spent a whole year here, thats nearly an entire education. Some people spend 4 hours each day on a raid, thats a full workout in the gym. Some people spend 10 hours a day, thats a full work day, of about 120€ salary, money which you could have spent traveling or buying a nice gift for your parents.
I realized in time that It doesnt matter how long you play this game, for how many weeks, months, even years... You will still get pissed off at the SAME stuff every time. You press the same 4 buttoms, you follow the same tactics, you wipe for the same reason, you get angry over the same misstakes.
Putting pressure on others is the only reward one can get here, once you realize that nobody is actually looking at how many achievement points you have collected, or what mount you are afk on.