I've been one in the past, and I've definitely met a few throughout the years. That week I was on sick leave but still volunteered to work from home and ended up working overtime daily without anyone asking me to do so, and without anyone praising me for it, it will always haunt me.
Employees have various reasons to leave a company, but they don’t necessarily share all of them during their exit interview. Most of the times, official reasons include going after a new opportunity or a better salary. But what makes them search for a new opportunity or a better salary outside the company at first place, this is the real question.