I was part of an event that was pretty much organised on FB recently and was forced to go back to using it on a daily basis for about a month (instead of popping back on briefly once I got reminded I needed to do something).
I noticed an immediate flooding of garbage on my timeline, literally 50% irrelevant crap or adverts from people I don’t have as friends. Just using it made me sad and angry. I’m now back to normal usage (“not if I can help it”) and feel a lot better for it.