Seriously, though, I hope that you realize that LLMs are incapable of "fact-checking", because they don't know what "facts" are.
Would you like me to fact-check that fact for you?
There is a way to fix all these problems by removing profit motives but that's obviously practically unworkable so the quality of the content is just going to keep getting worse and worse until everyone starts using services like arxiv and semanticscholar to get any useful information because those will be the only places where neither the hosting nor the content is motivated by profit incentives.
However, unlike most other open things that are subject to physical constraints, the Web is global—and globally there is a huge discrepancy in quality of life, level of education, mental health, freedom of thought, etc.
Which might mean that the ratio of figurative jerks relative to non-jerks stands to increase for as long as we have countries that are oppressed, poor, or otherwise score abysmally in relevant regards—or as long as we have global, open Web.
Either of those things will change, I personally hope that the former does.