My previous employer (PE) really did a number on me and my mental health. I quit suddenly with no notice after being treated like garbage. (Added bonus, it was the day my immediate supervisor left for vacation.)
I took time off work to focus on my mental health. My medication had quit working. I had unresolved grief from a parent passing. My self esteem was shot because of that job, too. If I'm honest, the job was a poor fit.
Part of why I quit is because I asked for a parity raise to match a new hire and they made up BS excuses why they couldn't. They blamed me for things that were the result of a poor manager. The usual stuff they do to get you to quit rather than admit they made a mistake.
I got offered a new job today making $7 an hour more than I was making a year ago. With better bosses, better benefits, and a larger better run business.
So, PE, you can kiss my grits. Better employers exist. It's why you can't keep people.