The earliest one that gets quoted frequently was a 1958 review published in The National:
As in the Disney movies, the whole world, the universe, and all man’s striving for dominion over self and nature, have been reduced to a sickening blend of cheap formulas packaged to sell. Romance, Adventure, Fantasy, Science are ballyhooed and marketed: life is bright-colored, clean, cute, titivating, safe, mediocre, inoffensive to the lowest common denominator, and somehow poignantly inhuman
It's a theme that gets repeated for decades: That Disney presents a "fake" version of the existing reality. That its watered down experiences made for mass consumption, not for deep exploration of ideas.
What do you think are some of the flaws of New Orleans Square?