I am also new here, and given some of the threads I have responded in I would no doubt have people giving me the side eye for some of my responses.
But I have glanced at the forums from time to time way in the past, and I am sure each expansion had it's fair share of negative posters and threads. But I don't know if it's been THIS negative this quickly. It's barely been 2 months into Dawntrail and it's just tons of threads about the story, characters, job design, etc and players criticizing and/or tearing everything to pieces. I wouldn't be surprised if the other language forums have many of the same threads with people doing the same things, although much more moderated then the English one I assume. Given Yoshi-P still directs feedback to the forums, I guess the copium is still strong they'll listen eventually even though so many things seem to have fallen on deaf ears despite the massive amount of complaints.
The state of Tanks / Healers / DPS jobs and their balance, the current state of PVP Frontlines, Female Hrothgar rigging issues [Although that video with the Female Hroth clipping through the floor during a certain Shadowbringers scene was funny], Data Center Travel issues. Those are just a few of the things that people have been complaining about for months to a year or more and there isn't much else to really do besides voice concerns and hope the devs and writers actually listen for once. Yes there are people who do reply to the threads who are rude and/or dismissive of feedback and criticisms for the sole sake of being rude and/or dismissive and not actually caring about having a conversation or helping anything out with their own "feedback" and "suggestions." But those are things you just kind of have to deal with on a forum that isn't really moderated much by the looks of it.
The copium is probably slightly higher then normal with Dawntrail too given Yoshi-P did mention they would look at the feedback about the story and whatnot during the patches and fix things accordingly, but only time will tell if they were actually serious about that or if it was just some PR bullshit to try and give themselves some slack for the next two years.