So far I've mostly used jerboa. It's a usable app, and a good starting point. That said, from a UI/UX perspective, it does seem to be missing a lot of quality of life features that were in Reddit apps.
Overall Lemmy seems like a decent Reddit replacement and I'm sure it will only improve with time.
Her exact response when I asked her why she was upset was, "Can't you see how that's a mean prank to play on someone?". She didn't say much outside of that.