I've also more or less stopped posting my photography on Instagram because (1) my Instagram feed is now full of AI images getting 10000 likes while I get 100; if nobody sees what I post it's not worth posting (2) people instead accuse my images of being AI even though I took painstaking effort to get to interesting actual places in the world during interesting weather (just after storms, etc.) and lighting, and this is incredibly discouraging.
It's probably AI accounts accusing you of AI