That's a serious mischaracterization, the author is clearly a fan of science fiction, but he prefers (from what I gather from the review, at least) the literary and metaphysical forms to the Campbell school. And it's a perfectly valid take. I consider myself well read in science fiction and of the writers of the 50s and 60s, I would rather read PK Dick or Jack Vance than Asimov's akward prose or Heinlein's sexual hangups. Not that Heinlein doesn't have great moments, for example one of the best time travel stories ever, but he's hardly infallible or immune to criticism.