I use Facebook for finding and registering to IRL events, and Instagram / Tiktok / Twitter almost exclusively for consuming tech, programming, and gaming content. With exes of mine, they seemed to mainly be scrolling through either comedy content or content related to their interests.
I'm sure it's very possible to engage with social media in unhealthy ways, but for the issue of modern life feeling isolated or empty, I wonder if social media has become an easy scapegoat for deeper societal problems. (some possibilities: work that doesn't feel meaningful or rewarding, insufficient leisure time, car-centricity / hostile urban planning)