It's definitely the format and the quantity for me. Seeing an old friend in person and having them tell me about their life and accomplishments, even showing me pictures, does not make me feel the same way. I think it's also the fact that I turn to social media when I'm feeling lonely, so seeing a feed of people at their best moments, on vacation with friends, getting married, having children, etc... makes me feel even more lonely and isolated. Also, social media is full of people that I have lost touch with, who never check in with me or reach out to see how I'm doing. I've found that I feel much more connected by reaching out to old friends one on one and catching up with them via texting or phone calls. Likes and comments just don't cut it.
I think also that the format is different, the link between people is not the same on social media posts. There is a difference between seeing something interesting, thinking of a friend who might be interested and sending it to him with a personal message like "check this out, it made me think of you, you might like it" and just putting something on display for people to see it, and add like to it to give you some small pride and some endorphin reinforcement of the posting behaviour.
It seems to me that the direction of the thinking goes the other way: in one, you think of a friend and contact him, in the other, you think of yourself, show yourself to the world and people send you likes.
When I thought of this, it seemed to me that social media is often some sort of "narcissistic exposure of oneself" and encourages this type of behaviour from me and I didn't like it. This plus the fact that I didn't like Facebook's behaviour with it's user's data made me delete my account, and I didn't miss it since. If I think of friends, I have other means of contacting them that have a more personal feel.
This is very true. And it reminds me that, at first, I did like Facebook, and I thought it was fun and cool. It's only when you realize how little meaning there is to the interactions that they start to feel shallow and depressing.
I feel the same way, and to me it's all about the authenticity. The context of social media takes away from the authenticity of the post. Someone may genuinely just want to share some dish that they just created, but in the context of social media, you can never be sure if they're posting it because of that, or posting it for the easy likes or easy engagement. Social media has commodified human interaction.
I forget where I read it, but it's similar to the idea that if someone you love makes a meal for you, at the end of it, you don't ask "how much do I owe you?" and break out your wallet. It's distasteful. Likewise, you don't do someone for a loved one or friend and afterwards say, "well that will be $X".
Posting on social media has a reward of sharing and liking, and as a result, to me, it turns human interaction into an exchange. (And I will admit that there is an element to that already, in terms of owing people favors etc., but the "bookkeeping" that we do is generally in our heads and is hard to quantify, which makes it a bit fuzzier and less commodified.)