It’s hard to produce an easier alternative for people who are too busy and disinterested to deal with anything technical. You need to beat Facebook on ease of use, cost, and network. The first one might not be too hard but the next two are almost impossible at this point. The only thing that could beat free is if it actually pays you to use it. The only thing that beats ubiquity is maybe exclusivity?
“ too busy and disinterested to deal” is a filter that allows RSS to work since FB et al would filter and bloat RSS if enough people used it. It’s value was already diminished considerably years ago when many systems and publication removed full text from RSS. It would get worse if it was used more.
All three are possible now with federated social networks, which are networks in the true sense and not just single websites calling themselves networks.