Brent Lee is a former conspiracist who has since rejected the collection of conspiracy notions he once believed and now talks about the dangers of such beliefs. He has a podcast with Neil Sanders called "Some Dare Call It A Conspiracy" wherein they describe what each conspiracy is and why it is untrue.

Links
https://en.wikipedia.org/wiki/Cognitive_dissonance
https://en.wikipedia.org/wiki/Flat_Earth
https://en.wikipedia.org/wiki/Vaccine_hesitancy
https://en.wikipedia.org/wiki/QAnon
https://en.wikipedia.org/wiki/Creationism
https://en.wikipedia.org/wiki/Milton_William_Cooper