None of this is surprising. I’m very sad to say this, but the internet of today, for all of its sophistication, sucks compared to what it was, and all the promise that it held, 20 years ago.
If we had designed the internet differently (eg: with considerations for privacy, authenticity, verifiability) we could pool resources and have millions of people report on medications, treatments, nutrition, etc.
If a regular person uses the web we actually have today to do their own health research, they're playing dice with their life.