one, what he might be complaining about with regard to a "cabal" is the internet tendency to dogpile people who don't agree with you, not whether or not said dogpile is accurately sourcing its collective opinion
two, he might not trust your surely unimpeachable "facts and sources", the same way I am willing to bet you don't ever read his posts and immediately think "I have learned something new, I must now reconsider my opinions based on these new facts with which I have been presented"
Now, I like you as a poster. But you made up your mind about COVID in March and you have had a COVID shaped bug up your ass about any post by anyone who doesn't accept your position since then. Whether Onboard is or has ever been a person arguing from good faith, I don't know-- I couldn't pick one of his posts out of a lineup. But you don't seem like someone, on this topic, who is evaluating other people's good faith, or frankly listening to anything.