I agree that a registry helps maximize getting gifts you’d actually like, but omg, you complained!? I’m sorry but I think that’s in poor form. :-/
So I went off-registry for the most recent wedding I went to. Something small, and also gave cash. It was something I saw and immediately thought of my friend and the groom. I’d be pretty annoyed if it got back to me that my friend was complaining over a gift I actually put thought into. Idk, if she doesn’t want, like, or need it, she can quietly donate or even re-gift it, she doesn’t have to complain in a way where it’d get back to me. That’s what I’d do if I got something I didn’t like or want.