Working in the restaraunt business hours get cut and people get sent home early all the time, that's why it's best to have 2 if you paying bills
Sounds like she should've had a one on one talk with this manager and went above her head if necessary, u work for McDonald's they have rules.
Her rant sounds like something u say to your coworker outside to vent, social media has her really talking to herself looking at her phone, getting reactions from people not there.
She's also batshyt crazy. She should've been in a mental hospital. She stabbed her manager to death 15 times in the middle of a McDonald's and had to be told to clock out, she thought she was gonna go back to work afterwards.