So I kind of hated George Alec Effinger’s Those Gentle Voices, even though I liked one of the things it was doing. I really expected more because I loved his Marid Audran series. My main problem with it was that the first two chunks of the book set it up as a serious book of space exploration and possible first contact with alien life, then once the astronaut scientists arrived at the planet they were looking for they behaved like six-year-olds without proper supervision.
If it had been set up like a Stanislaw Lem story (especially something like the Trurl and Klapaucius stories in The Cyberiad) the completely stupid lack of planning for a first contact mission wouldn’t have bothered me nearly so much. The “scientists” set themselves up as god-kings on this planet on which culture evolves ridiculously quickly and they have insane amounts of material resources apparently. If it was being told more like a fairy tale, fine, but set up as science fiction it was constantly breaking my sense of disbelief.
What I did like is the structural thing where the book started with PART TWO, then things proceeded normally, until you reached the final section which was PART ONE and totally explained some of the oddities that started the book off. (Also, this was the first book I remember reading where there was a librarian character who is just antagonized by a protagonist for no reason and with no resolution, so that might have affected my judgment.)