I only saw this post today for some reason.
First of all I'd like to say that what you're trying to do is admirable from the perspective of someone who also refuses to use Big Tech platforms as much as possible. I find the reactions on the sub you cross-posted this to to be exactly what you would expect from the average person, honestly.
In my view, many people aren't prepared to firmly hold their position regarding technology use, especially if it means sacrificing convenience for privacy. However, my opinion is that you can maintain connections with such individuals in real life; and in general if they're not willing to take the effort to engage with you in the way that you prefer, then perhaps they're just not worth your time in my opinion.