The story has some rather clear political biases that a lot of people don’t like, and I can’t help but think a lot of the criticism of the series comes from that. The most tyrannical human characters in the book impose their tyrannies for the sake of collectivism, and collectivist authoritarianism comes very close to dooming humanity more than once. I can imagine people who have collectivist political outlooks not liking it at all.
I don’t see anybody criticising those aspects, though. When people criticise the science or the plot or the characterisation, why not take them at their word?
