>I didn’t like my online persona.

I think this is one of the bigger factors when people choose to quit social networks, even if they don't realize it explicitly. There's such a "hustle culture" to get likes and favorites that it really warps what you can post. You can't really be vulnerable on a social network because it either gets ignored or interpreted as another hustle ("You got this!!!") because the surrounding content from everyone else is "Look at how great I am!". YouTube creators have to explicitly say "Please like and subscribe!" but that's implicit and pervasive on Twitter and Facebook by their very nature.

I used facebook for promoting local events but in the last ~5 years it was less and less effective for that. Then I used it only for meme groups and getting angry at strangers. Hard quit last summer and never looked back.

You don't have to join meme groups? They're easier to avoid than a toxic algo. I just use groups for hobbies I actually engage in.