If these people are actually your friends, maybe you should show them more respect and stop assuming that the reason they are single is that they are less mature than you and chose to “chase hedonism” and “Instagram followers” over long term relationships. Despite what you might believe, it isn't easy for every person to find a long term partner, and not everyone wants to do it at the same point in their lives.
I’m not assuming anything, they’re friends I’ve know for many years and I’ve been there with them as they’ve made these choices. I’d like for them to be happy but there’s only so much you can do.
I think the problem I’m describing is pretty common amongst gen x and millennials.