I'm getting kind of sick of showing people facts, data and information that proves that the mainstream narrative is bullshit, then having them say something like "well, everyone has their own truth. You just look at sources that confirm what you want to believe."

Um, no. Facts are facts and facts are what I deal in unless stated deliberately otherwise. I'm happy to admit when I am mistaken about something. Listening only to that which you wish to believe and denying or ignoring anything that you don't want to believe is kinda what you would be doing by assuming that facts are subjective and that no one but you is capable of drawing conclusions beyond their own confirmation bias.

Shit, I WANT to be wrong most of the time. In most cases, I welcome anyone who can prove it. Few make even the effort before just assuming that they already know enough and can't be bothered to consider new info or rethink a single goddamned thing.