I've never had a reactionary dislike of "The Way To Eden" and I was born in 1959. By 1970 when I first saw the episode I was already aware of hippy culture even if I didn't fully comprehend it. In the end it often seemed to me that the hippies and many (but not all) of the youth movement were rejecting established convention yet without any real alternatives.
I didn't take the episode as a direct allegory of the times. I simply accepted it as an adaptation of the hippy or youth movement idea put into a science fiction story. Like "Spock's Brain" there is a worthy story at the heart of it, but like "Spock's Brain" it isn't fully explored and fleshed out. Star Trek
was still essentially an adventure/drama and had to get on with the story. It's rather like The Dark Knight Rises
getting cut up because it doesn't fairly and fully address the social divide between rich and poor---Hello! It's a comic book superhero story dressed up with some sense of "realism."
Actually you might argue "The Way To Eden" gets its point across more clearly than The Dark Knight Rises.