What is the problem your friends have with you not being on Big Social Media? Is it that they want to be able to message you over those platforms? Or do they want you to see things they post? Or something else?
Anyhow, it was more a philosophical problem that brought me back. I said, in so many words, that I wanted to be more "zen" (whatever that means) and eliminate distractions. They argued that I was not in a "zen" place if I let distractions bother me in the first place. So I took it as a challenge (which I failed). I think it easier to turn things off permanently than to master one's own willpower.
Also, different people have different sensitivities. Don’t be so quick to write sensitivities off as weaknesses. To illustrate: the nervous system (and most other things) depends on sensing, and would simply fail if it were rendered too insensitive. Your sensitivities are often strengths when managed accordingly. Practicing and challenging them has it’s benefits, but we want to be strategic with this rather than simply withstanding to no end.
That's one reason I left Reddit; too much coming down the pipe, even when my subscriptions were pared down to a few technical groups. It was easiest just to completely stop going.