I recently caught my chud family member watching some dumb youtube video about “experts lying about COVID” (yes, chuds are still malding), and like, what’s the fucking point anymore?
You can be as gracious, understanding and in good faith as possible, but people will believe whatever nonsense some idiot influencer says is the truth. It makes me so mad, and unable to argue with these people, because their irrationality makes me irrational. Fuck.
Anyway, how are y’all doing? 
I’m in the same situation. I just don’t talk to these people anymore and tell them to shut up if I can’t get away. I’ve spent years like you probably trying to carefully explain things and they just revert to saying heinous shit about women, immigrants, tree-hugging liberals, etc. the second I’m not around.