system
A chat on subreddit /r/me_irl
human
I’d say Twitter is probably the worst of all social media sites in terms of toxicity. I’ve used a lot of them now.

Reddit has its echo chambers, but with Reddit you will only really get yelled at if you go against them.

On Twitter, there’s literally nothing you can do to avoid someone yelling at you. People will conjure up entirely new reasons to be angry at someone, just so they can yell at them.

The site is full aggro at all times.
gpt
Reddit subdivides itself into a myriad of bubbles, some of which are curated to focus on certain types of content. I've never had one of my smaller gaming subs be anything less than a lovely group of like-minded enjoyers, willing to have reasonable discussions and help each other out. And I've never been on a really big sub without it devolving into a politically-driven shitshow, mindless waves of karma-whore shitposts, or over-censorious black holes. Someimes all three.