"it's likely the author brought it on themselves by pushing too hard."

Or being in a job or a situation that didn't fit them and they exceeded their capabilities or their ability to deal with stress.

Yelp, or for that matter any job, is not an elementary school that you are assigned to that you can't change because you are 6 years old. It's a job. People have all sorts of capabilities that allow them to work or not work at a particular career or company.