It would be sad to go back to walled gardens like AOL, particularly since they were corporate-owned. But a sort of Kite Mark, certifying a site is free of LLMs, would be useful. Then users could choose for themselves.
Annoying hashtags are legion. Since they're supposed to entice, which #AnnoyingPhrase doesn't do, it's unlikely to have an effect if you filter it.
I use the whack-a-mole approach, and deal individually with each type of annoying hashtag as it shows up. Some generic types can wipe out whole swathes of posts you don't want to see.
I'd suggest a few hashtags, but I don't know what annoys you.