When private housing got released, I criticized how faulty it was and how bad it was but in a polite way without attacking anyone, simply saying that it wasn't what was promised.
The response: "Don't buy it then"
Expressed my opinion regarding the story which differs from the norm, without attacking anyone and simply stating my opinion in a non-rude way, and even saying why I thought could've been different.
The response: "You're wrong" and that I have no idea how jrpgs stories work. Despite having over a hundred jrpgs under my belt
Once I kindly asked a tank to press one aoe button because me, the healer, was dying from the lack of aggro and we were wiping at a level 30+ dungeon
The response: "Chill he's new"
Before the unskippable cutscenes, I reminded the tank of the group that there was a few people behind watching the cutscene, and that we could have trouble later on (this was ARR)
The response: "shut up" and got kicked.
Told a dps to let me aggro first or else he'd overaggro and die. Which he did because tanks aggro wasn't like today.
The response: "Do your job" and got kicked.
Cherry on top: despite being an abuse of power, I was told that "I might be wrong" on the report. Sure, of course.
Bottom line, that's not how it works in practice.
On paper yes, you can be critical without being rude. However ANY sort of negative criticism in this game is like a personal attack, therefore no matter how well articulated or how well developed your argument is, as long as your criticism is negative then it's a problem. This applies on every single game, not just here, as proven by my different opinions and criticism of other games which are beloved by many.
Only exception is when everyone collectively dislike someone - like criterion or how relics work in this expansion (which I ironically like!). Otherwise no, your opinion is negative? Then you're the problem. Go back to wow and shut up.
As a matter of fact, I stopped talking or criticizing the game altogether for this very reason: if the game gets worse, I know sure it's not my fault since everything I said was wrong.