SM in its current form is truly a cancer on society. i can't say IG is that much better, but at least i can sort of curate what i want to see and i still see photos from friends and such and just random ads. i know it's just pointless scrolling for a few mins. FB truly is one of those pull you into the echo chamber to tell and show you how to think and it only took a few minutes. i don't even know what years of that does to you.
anecdotally, most people my age already left for other pastures. the ones left there are largely those who joined up to connect back when FB was actually useful and are now around for the ragebait.