Social media, like alcohol, seemingly manages to be one of the best and worst things that's happened to humanity.
It's exceptionally convenient and useful, but if not treated with a considerable amount of caution will completely thwart your better judgement. It's designed to be as addictive as possible, surrounds you with superficiality and misinformation, and erodes your concentration span.
Social media is full of inspirational quotes and stories, but it actively works against you in actually achieving anything in your own life.
It's not inspirational at all. I've never found it to be a pressure, but then again I never had to compete with classmates for selfie likes.
This, coupled with the insane privacy, targeted manipulation and ethical issues, make social media probably more bad than good. The only social media I use are Reddit, Snap Chat and Facebook (but I uninstalled FB on my phone). And TSR, if you count that.