Companies that build large LLMs have already said that this is becoming a problem. They're running out of high-quality human-written content to train their models.
Google paid Reddit to get access to their data to train their models, which is probably why their AI can be a bit dumb at times (and of course, the users that actually contributed the content don't get any of that money)
I'd connect vis SSH and manually inspect the files that it's supposed to be creating. Does
apt updateshow any errors?