This resonated with me so much. I worked through a so called friend who did this to me.
She ran me into the ground and then left me with no fight so I walked away. She had made me so ill I didn't have the strength to fight and I know I should have.
I wasn't the only one she has done this to, it is a pattern and has happened to most of the staff at one point in their life. We are all still waiting for our karma, hopefully one day it will come.