Mean boss

I work for a graphic designer office, I have to daily describe 1000 logos using minimum 2 words. It is a 6 day job per week. If I lag behind I have to work 7 days a week. I get paid bellow minimum wage. And if the manager does not work someday, I get no files that day and I have to work for 7 days to catch up.. On Saturday I did not give files, he messaged me at 11pm and then on Sunday morning to tell me I need to miss my Sunday in order to complete the files. It is a freelancer job and it is not an employer - employee relationship, it is flexible. The owner is relatively young and he has a 6 yo kid. He says I do the most important job in the office and I am responsible for him providing for his kid. He posts many photos on social media but never with a wife. And when he posts with his kid it's only the 2 of them. I assume he is divorced or a single parent. He does nothing much, he just takes the logos from the designers and gives them to me and the clients. In an older post of his he was looking for work and he stated "I will not work for pennies"... I get migraines with aura cause I have brain lesions and I try to get as few as possible, I keep having lately cause of the pressure and it is dangerous. So I just ghosted him and I am in the hiring process for another job with less time and more pay.