I don’t get the email analogy.
People did and DO complain about setting up email. ISP email is a great example of this. People forget their IMAP and SMTP address configuration stuff all the damn time. Always have.
I used to do home IT, and I had to help people through that crap constantly.
That said, these days people have gravitated to clients like gmail or outlook. Those push the user onto a certain domain, which makes setup dead simple. This is what mastodon.social is doing now. Making it so people don’t have to think about the instance at sign up.
Yeah I agree email kinda sucks. But everyone still uses it, and (as far as I’m aware) people aren’t writing articles about how confusing email is for people and why that makes it a failure. Mastodon and Lemmy are, in comparison, much better and way less confusing but you see that said all the time about them.