Good for you. I've been playing since October 2016, and yes, I have been told to shut up and not tell people what to do plenty of times. The last of which, incidentally, was on Seat of Sacrifice Normal. I was not rude, I was not aggressive. I simply gave a heads up about how the AoEs change depending on whether he charges with Fire or Ice. And many times I was perceived to be aggressive in asking people to heal a certain way, do damage a certain way, use tank cooldowns a certain way, when really I just wanted people to have a better time and not feel frustrated. I even got told off when someone said "God GNB is so squishy" and I pointed out that they weren't using Nebula at all, which would help a lot, especially at the start of a mob pull. And that's all I said. "It's not squishy. I noticed you haven't been using Nebula that much. If you use it at the start of a pull, you mitigate most of the damage and you won't feel so hard-pressed." I got told to stop being an elitist and was threatened to be reported if I told people how to play. What was I supposed to answer to that?
Great that that's been your experience DiaDeem. And I hope you don't have to go through it yourself. But others have. If you haven't experienced it despite playing for so long, then be grateful you haven't encountered people like these. Because when you do, it's really hard through to them that you're there to help.
It doesn't devalue all the other good experiences I've had. And odds are it may be a Datacenter difference, who knows. But those experiences do exist. Some people just do not want to listen, and immediately get angry at you for speaking your voice. Ironically enough, I remember one point in Doma Castle where the tank thought I was calling her out and got aggressive, again saying I was being elitist and not letting new players make mistakes and learn. Me and my FC mates at the time managed to calm her down and she said that she's just too used to playing other games where people are usually mocking and aggressive when pointing out mistakes. She ended up giving me a commendation.