While everyone here is thrashing the OP for their rather extreme statements, I'll say one thing.
"It's a beta" is a terrible argument in that 1. We heard the same thing about Apple Maps (look how that turned out) and 2. These UI elements are most likely finalized. We will only see VERY MINOR UI tweaks before the GM, and buttons are pretty major in the UI.
Just my thoughts.
You're probably right. On the whole I think iOS 7 is wonderful, but there are definitely some misfires. We may have to wait for iOS 8 to rectify them.