This book got a bad reputation in Brazil because a famous actress (who supposedly isn't very bright) once said it was her favourite book.
When I finally decided to give it a try, I found it to be a very interesting read.
So, you can bet people who show disdain for it probably haven't read it. Or they have weak character and are afraid to be considered dumb by association.
There are probably more people around the world who know about The Little Prince from the distinctive illustrations that show up everywhere, than there are people who have actually read the book. It's like Peter Rabbit. Everyone instantly recognizes the illustrations, but often has a hard time explaining what the book was about.
Your comment made me think of Charli XCX's recent post https://itscharlibb.substack.com/p/the-realities-of-being-a-...
Who was the actress?