the mental toll was the second biggest reason why i started using lemmy & the fediverse full-time instead of reddit or facebook like i did in the past.
there's still a lot of redditors & facebookers on lemmy, but they've thankfully quarantined themselves either on .world or used the extensive block lists that they curate/share w each other; effectively keeping the tribalism & toxicity they carried w them at bay and atleast for now.
the biggest reason was because of the content suppression and it's been a real eye opening experience for me to watch those self-quarantined sections of feddiverse heavily leverage that toxicity & tribalism to keep the content that they don't like at bay for themselves.