They cherrypick your backgrounds & return them to the industry standard you were determinedly working away from; gut your structures of any difficulty & re-present them as being unwittingly “correct” (how amazing that you were almost doing it properly); & wilfully fail to get the point of what you write so they can pretend that having a point isn’t the point of writing. Oh, they love you, they don’t want to upset you; but more importantly they don’t want to upset anyone else. So they take what they want & leave everything designed to make your stuff upsetting. Then they wonder why you won’t give them a quote for their novel. The pets. Your heart goes out to their turmoil.