I'm not sure how anyone is supposed to take that, perhaps it indeed is a sign these things might not be for children. :) I'm not sure how I'd feel if my nephew was subjected to this.
But with that said, I do want to remind people that there were abstract and surreal themes and art in children's media before. Winnie the Pooh had the "hevulumps and woozles" and then there was Halloween is Grinch Night, with the bizarre ten minute stretch of ghouls and shifting shapes trying to scare the main character. There was violence in Tom and Jerry, Looney Tunes, and almost every cartoon I watched. The gore and extreme sexual content are probably a bridge too far though, but it's not some of the milder content is that far outside what we watched as kids.
EDIT: I do admit though that this is different and I mostly agree with the author. The surreal stuff in kid's cartoons had some artistic intent. The "surreal" stuff here is essentially unintended, and merely the shoddy examples of a system meant to exploit children.