We have to remember that the people that are still posting on these forums - months into an EA (which hasn't had a major gameplay update yet), are a very self-selected minority. Most people played the EA, posted their feedback, and moved on.
I've generally observed 3 camps here in terms of opinion - people who want BG3 to be more like DOS, more like 5e RAW, or more like BG1/2 - and on any given day or thread, any of these groups could be the most focal.
Compared to the Steam forums, I can't say that this place is toxic. There is a small, vocal minority who are very emotionally invested in what they want BG3 fundamentally to be. Given that, sometimes discussions have devolved into emotional venting instead of actual feedback and game discussion.