On the Mastodon side of things, I have a word filter for "reminder". If a post contains the word "reminder" in any context, I will not see it.
I've just found that most of the time, people make posts like "Reminder that <highly subjective opinion>". I really don't know, if it's a meme at this point, but I still don't particularly care to read it.
another reliable one is “PSA: “. sometimes they are helpful, but most of the time it’s stuff i already know, or stuff that’s fairly subjective (and that i’ve heard before)
Seriously. It's honestly easier to find chill communities on Reddit, even if I hate supporting that site. But at least it has non-political stuff. Politics feels impossible to avoid here.
Apparently just invoking that name is enough to give you downvotes. As reddit sheds users in its overt attempts to monotize, I think those communities will work their way over here in due time.