I think your post made sweeping assertions and that what you profess to "know" is nonsense.
Much clearer, yes! What I'm not clear on is what you think is "nonsense."
Do you disagree that anyone who spends a lot of time moaning about people posting online often online, ironically is probably unhappy or bored or insecure or unfulfilled?
Do you disagree that people who think it is genuinely a bad thing to say/know that they look good, or are doing good things, or are having a good time will generally be more confident and happy within themselves?
Do you disagree that people who post selfies don't scroll through their friends lists to see who hasn't posted them, and then mock them or care in any way?
Do you disagree that someone who gets upset of attractive pictures of other people, or posts that suggest they have had a nice experience, is probably very insecure to be affected?
Do you disagree that anybody who slut shames girls on social media is embodying ideals that are misogynistic?
Do you disagree that the "I'm not like other girls" mindset is telling of internalised misogyny?
Do you disagree that you control what comes up on your feed?
If not, what exactly is it that you disagree with?
I think you come across very bad tempered and very unlike a happy, confident person.
I am very happy and confident, thank you.
But it's possible that I'm coming across as "bad tempered", because I genuinely cannot stand people who whine about this. I can't stand people with internalised misogyny. I strongly dislike anyone who projects their own insecurity into everyone else's life. Uneducated/ignorant people make me want to bang my head against a wall. People who go on tangents about social media generally are a delightful mix of all three! I'd much rather mix with loads of people complimenting each other's clothes and accepting the compliments wholeheartedly and giving good restaurant and health/food tips and talking about wonderful holidays and experiences than anybody like that.