They should be written clearly, without obfuscation. If you have none, then that's exactly what they should say.
but none of the ones I've read qualify as "informed consent" because even if they're clearly understandable, they don't fully inform you. They always mention sharing data with partners, for instance, but never say who those partners are, what data is being shared with them, and what those partners are doing with that data.
Unless you know that, informed consent is impossible.
Every privacy policy I've read seemed very sensible to me. Remember that privacy policies are legal documents and they quickly become cluttered with "legal-isms" and verbosity. Sometimes companies will move heaven and earth to make their privacy policy readable at a 3rd-grade level. And you know what? That costs them money and they pass those costs on to consumers, who overwhelmingly don't care about what's actually in the agreement (because they have a fairly good understanding of what kinds of things it says anyway).
Complaining about them seems to miss the bigger picture.
but none of the ones I've read qualify as "informed consent" because even if they're clearly understandable, they don't fully inform you. They always mention sharing data with partners, for instance, but never say who those partners are, what data is being shared with them, and what those partners are doing with that data.
Unless you know that, informed consent is impossible.