If anyone remembers the Reddit user "lifeafterlyme" (or the Nightmare Expo video about her), I think I've found a similar person on Tumblr.
https://my-muse-and-allthe-little-things.tumblr.com/She's sporadically been writing word salad-esque rants about her family underneath unrelated posts since April 2015. Some of it feels like something your typical Facebook mom or boomer would type, and a few of the posts manage to be on-topic, lucid or even funny at times, but then she veers off into claims about the government, her husband cheating on her, other women (who she often calls "you females") scheming against her, abuse, how blackface is illegal, having gang connections, someone she's dubbed "Mattress Mac", and more. Her early 2015~2018 posts were more positive in nature, often using the phrase "trust is key" and talking about moving forward with her kids, but as of 2019, she seems to be going through a rough patch. Lots of paranoia and anger. She made one post in June claiming she's "deleting her blog forever", but just started posting way more often than before.
What's kind of worrying is that a few of her posts talk about how she has children (3 to be exact), and one of them is developmentally disabled. She mentions dealing with having an autistic child a few times, too.
Unlike istherelifeafterlyme, she doesn't seem to have doxxed herself in any real way, so it'd be difficult to call for help for her (she's mentioned that she's 34, and has implied a few times that she's from the south). There's no dramatic, progressive breakdown of her coherency, or much of a linear explanation on what caused this (though, she's mentioned being an abuse survivor, having manic depression, a genetic disorder with a 50/50 chance of passing to her children, possibly having autism, the list goes on).
I wouldn't really call her a "personal cow" since this concerns me more than it entertains me, but her blog is kind of a deep dive of strangeness. I'm not really sure what to do with all this.