Honestly the ASMR community, at least the comment section, are among the best I've seen so far.I use youtube, instagram, twitter and sometimes reddit.
Twitter is definitely the most toxic by far. There isn't a way to stay away from drama and toxicity, it's a literal cesspit. Instagram is okay as long as you follow decent people. I would say youtube is the least toxic but I guess it depends on what kind of videos you watch (eg the beauty community lol)