This is not a TAAT, it's about many threads.
Every time someone posts about seeing(on social media or real life) other people happy/having (what they assume) a good life/ enjoying or having something or other, the thread fills with other posters trying to convince OP how those people must actually be miserable,insecure,vain,boring,insipid nothings. The partner must be cheating, they must be in debt,their kids must be awfully behaved, there must be depression/illness/ infertility etc.
Something, anything that would supposedly make OP feel better because others have a shit life too.
It's like people aren't actually allowed to be happy.
No one's life is perfect that's true but why do so many people have to find so many reasons that someone can't possibly be reasonably happy or have an ok life?