I like Facebook, and probably check it several times a day. For me, its a great way to keep in touch, in a very casual and limited way, with a lot of old friends and acquaintances. Anyone who I find to be annoying can be "unfriended" or their entries hidden. I like to use it to keep a running battle with my left wing relatives who still can't get over Trump's victory. I actually have put some pro-2nd Amendment and concealed carry articles on to Facebook and have had feedback from some folks who I have no other contact with, and who are not "gun" people, who now are more supportive and in one case, actually joined the NRA based on what I have put on Facebook. I also use it for communication with certain groups, such as an owner's group that owns the make and model of my camping trailer, and I have posted problems and received solutions via that Facebook page. Ditto for the Durango owner's Facebook page.
Of course I take much of what people post with a large grain of salt. Most users do not talk about their failures or challenges, but only about what they are happy about. I don't get depressed or despondent thinking everyone has a wonderful life except me based upon Facebook entries. And like it or not, social media seems here to stay. Most of my grandkids stopped making actual phone calls years ago, at first using email almost exclusively to communicate. Then email became a thing of the past, replaced by texting. While texting is still the primary communication tool for these young people, social media is also a key medium for sharing thoughts, pictures, likes and dislikes. I miss some of this because I am not on Instagram, Twitter or any of the other myriad social media sites, but I do keep in touch at least a bit through Facebook.