This was part of the problem for me; it made me think I had more friends than I actually did. What I really had was an app that showed me what everyone I used to know at some point was up to, and many of us start to mistake that for friendship. At some point I had the epiphany that I don't really know the kids from my high school friend circle anymore, and keeping up with them doesn't improve my life. We had our time, the friendship fizzled out as they tend to do, and the healthiest thing for me was to just move on.
My life improved after quitting Facebook because it forced me to be more intentional with who I spend my time on. Rather than passively blasting everyone's news feed with something, I send it individually to the people I want to see it. It makes me be an active participant in friendships, which is something I've had trouble with (at least when using Facebook).
I'm one of the normies like the grandparent comment. I don't use Facebook all that much, and most of what I see there is just a stream of banal life events from a selection of people that I'd otherwise not hear from. Most of it isn't that interesting directly, but I'll admit that my life is enriched by retaining these relationships I'd otherwise have dropped. It's definitely not something I feel bad after using.
Obviously that's not your experience, and there's nothing wrong with that. Certainly you shouldn't be forced to use this platform if it makes you unhappy. Really this just goes down to "people are all different and we all have to find our paths through the world". Technology changes the battlefield a little at the margins, but it hasn't changed the war.