Yeah. I bought a 13 Mini recently so I could use my phone with one hand, discovered I still couldn't (and I have large hands), and returned it. I don't see much point in a small-ish phone that people can't use with one hand, so I'm not surprised it's flopping. IMO they needed to either commit to a truly small phone, or give up on it. Rumor is they're doing the latter.
Guess it'll be pop-sockets for me from here on out!