I cut all of FB and their ecosystem out of my life years ago. Can’t say this one person out of billions has had an effect on the company but at least I can honestly say I’m not even a tiny part of the problem.
I don't proselytize to normal people anymore because most just aren't receptive to the message. It's like an addiction. Even when they agree with me, everyone has their little excuses as to why they can't possibly quit. And at the end of the day your one-one-billionth share of the problem amounts to peanuts, anyway.