Material Design: Why the Floating Action Button Is Bad UX Design

I also dislike the FAB. I already wrote about it in a previous comment, here's my major problem:

It is still the last place I look on the screen to perform an action. I look at the top first, then I check the hamburger menu and only then I realize it was BENEATH MY THUMB all along. I hold the phone with my right hand and my thumb naturally covers the FAB area.