If you are dissatisfied with your current position, it may be more productive to focus on exploring new opportunities rather than remaining in an unfulfilling role.
Any employee has more understanding of their own best interests than you or their employer do, and these folks had been choosing to remain with the company up until that moment.
So one can reasonably assume that most people are worse off when they get fired, even given any survey response whatsoever.
The employee believed it was beneficial to express their feelings and stress levels to their employer. However, this information was subsequently used against them. Given the stress the employee was experiencing, a more effective course of action might have been to exercise discretion and focus on finding a new job rather than voicing their concerns in a manner that could be counterproductive.