"Discourse" is almost universally just a bunch of people with a poor grasp on rhetoric or research arguing with a bunch of other people who also have a poor grasp on rhetoric or research.
You get the people who passionately believe in a topic and will post a thousand essay or video recommendations about the Discourse Topic to help change the minds of those who are currently opposed to them, wasting hours of their life on something that will never change because, honestly, nobody clicks those links. Then you have the bad faith actors who know the aim of the people they are engaging with, and try to rile them up or get them off-track (you see this constantly with any Discourse having to do with certain People's Republics). Then, of course, you have the people so far in the weeds, so angrily fighting whatever internet war they've been dragged into, that they have stopped being able to see what is actually discussed and have resorted more to tribalism with the people who agree with them.
I'm not even thinking about anything specific here. Sometimes huge weighty issues like racist institutions and authortarian governments are thrown in, though most of the time it's "///This fandom thing is Problematic and here's why, my thread ///" and it's all just drama. It doesn't matter the topic; I think some people just really want to argue about stuff, regardless of how informed they actually are about it. I've seen too many wonderful internet people, both celebrities and acquaintances, devolve into Discourse Machines; all they can do is talk about "takes" and "lrt" snark and post "yikes" about fifteen times a day. It genuinely makes me really sad.
If I had access to unlimited power for one week, my first act as world dictator would be to delete Twitter and delete all web archive backups of all tweets ever made. This is how much I hate the Discourse and what it's done to friends and acquaintances over the years.