No clue if the other 2 people who followed me in the role were fired or quit.
At this job I was close to breaking mentally. I had never sucked at a job before, yet everything I did was apparently wrong, I was costing the owner money, it was a powder keg where I was trying to fit 16 hours worth of work into 8, etc. I kept internalizing it, thinking I was the fuck up, and it made me angry and caused me to get on average 2 hours of sleep a night.
But I learned something: If there's high turnover then it doesn't matter how much you try. You're eventually going to leave or be let go, no questions asked.
If you tried your hardest than you did all you could. You can't please everyone, and you can't fix a shitty business. Being fired ate me up inside for a long time, but I realized it wasn't the place for me. Life has been better since.