After setting up an Android phone for someone recently, I think it's stuffed with dark patterns. The amount of times that OS was pushing me to enable or opt-out from syncing different things to their cloud and generally sabotage the privacy via various settings was staggering.

Windows is certainly on the same path but I'm not sure how far ahead or behind they are in the competition to screw their users over with these dark patterns. They only have to trick you once.