It felt really empowering to write a 20 second resignation letter that reads,
March 22,2022
It is my greatest pleasure to be informing (company name here) that this is my notice. My final day will be April 1, 2022.
(Signature)
It took me 4 years of being a punching bag and finally having a (known at the time of being hired) medical condition thrown in my face. I had told my boss that if they started pulling my overtime, that I'd be looking for another job. It was laughed off, the overtime was given to people with far less seniority, so I started job hunting.
2 weeks and 6 interviews later with a job offer from all but 1. Guess who won?
My company's competitor down the road.