I stopped using Facebook in mid 2014. Facebook was a lot more fun when my network consisted of a more intimate friend group, where we could joke around without too much other noise. I think it started to wear on me when my network got so big that I was seeing unsavory posts from people I didn't even know that well, and even more so when I would see family members get really politically charged up about things, often times about things that ended up being hoaxes or untrue events.
The final straw was when I started getting unwanted push notifications about random friend activity: "So and so just posted a photo." It was actually quite difficult to figure out how to turn that off, and then I started getting it for multiple different people, some of whom I wasn't even close with. This is when Facebook became unwiedly and undesirable for me.
Haven't really missed it one bit.