I think one of the most important things to remember about most social media (and I'm mainly referring to Facebook, Twitter, Instagram), is that you are not seeing anything resembling the real life of most of the people who seem to be posting non-stop. No one is going to post a photo of their tear-streaked face after they were fired (or mention that it was the third job they've lost in as many months). People show themselves in the best light at the best moments. In truth, their life probably has little, if any, resemblance, to the person they portray themselves to be.
I know someone and I've known her for years, she lives near me, who is addicted to posting to Facebook. Since having her children, she has put on about 80 pounds, which she never took off. For the photos she posts of herself, she uses apps with filters and just does face shots. She looks gorgeous. No one seems to wonder what's going on from the shoulders down. And, I'm not big on physical beauty or saying it's bad that she gained 80 pounds. In fact, I think it's irrelevant. But, she doesn't, so she is careful to make herself look beautiful when she posts a photo of herself. The same woman is one of the worst mothers I've ever seen. She doesn't invest any meaningful energy into her kids or their development. But, they're very cute and she like to dress them up and pose them for photos. I've seen her ignore her kids, or be verbally abusive to them, while she is at that very moment posting "adorable" photos of them on FB. To look at her FB page, you would think she Mother of the Year. She posts recipes, yet might make homecooked meals half a dozen times a year. I realize that not everyone does this, but it's prevalent enough.
The lesson: never, ever compare yourself negatively to the "perfect" people you're connected to on social media.