I run my DS social media account it is set to private , there are positive and negatives, but it also down to the person how they deal with social media. We do not use it to compare DS to other children he is what he is and can do what he can do end of. I post a journey of his adventures initially it was a sport he was doing an now dance. through this account, he has had the most amazing opportunities, made amazing friends and he wouldn't be on the once a month associate programme he is now which helped him immensely after his confidence being so low from a sport, that made him not want to live anymore - aged 8 at the time!!
I know some parent judge us for posting, and that's fine , because I could not give two hoots. We are realistic on our account it is a mix of cool edited photos fun videos and general everyday type ones, all to document a journey nothing too serious.
He does not see messages unless I show him, he does not deal with friend requests and he comments on things that are appropriate under my watchful eye. He promotes encouragement and positivity to others and is not harming anyone in any way.
If you choose to look at other accounts and judge your own child or compare them to others then that is a question for yourself, if you use social media as a source of information for events, celebrating other achievements and celebrating your own child and not to take anything to seriously there would be a lot of happier people. I think people get to caught up in it and read into things way too much.