I love FB. I limit my friends, and I use filters to control what kinds of posts come across my feed. I have a small business page as well as my personal page and I also belong to several special interest groups on FB. There I can learn things about whatever craft or hobby or interest I have with people all over the world. I can learn from them, and I can contribute my expertise as well.
For the most part, you can control the kind of experience you want to have on FB. Every now and again I come across things that irritate, annoy, or even sadden me, but I come across those things irl too. I don't have to be blown about by every wind.