It doesn't, really. It labels a person a "social media poster who identifies as a reader" based on them passing negative judgment on difficult books ("fundamentally fraudulent") and those who read them ("anyone who would read such a book must be pretentious, phony brodernist snob").

Sure, there is the middle part ("books are supposed to be fun and the world is so awful why would you want to suffer"), but I took the bit about negative judgment to be the main thing the author was complaining about.

Given the way he framed it, if you somehow will admit to fitting his scarecrow of a reader who considers these "fundamentally fraudulent because books are supposed to be fun and the world is so awful why would you want to suffer and anyone who would read such a book must be pretentious, phony brodernist snob" then I'm not sure what sympathy you are expecting here? Yes, the author laid out a comically philistine portrait of an anti-intellectual and you're like "yeah that's me I'm mad!!!", so yeah maybe think about that and why you think it's ok.