It would be very ironic if the reason people complain about Facebook so ardently is that they just didn't have enough friends IRL in first place to make Facebook work the way it should.
I do agree with your general sentiment, though: Many complaints about Facebook come from people who don't want to invest time into finding their friends online and engaging with friend content. They log in, see what the article sees, assume that's all there is, and abandon it. Most people just move on, but a few will complain about Facebook based on their limited experience from 10 years ago.
It is like saying that in order to keep my e-mail inbox full and entertaining from now on your email provider will fill it with AI generated content. Madness.