Suzanne feels overloaded at work and feels that she has a lack of control over her work environment. this has led to exhaustion, cynicism, and a sense of failure or inadequacy. it is likely that suzanne is experiencing a phenomenon called:

The phenomenon she is experiencing is called burnout

Basically, too much work and too much stress caused her to be miserable and exhausted. If she stopped working eventually she would feel good again, but she probably can't do that. Burnout is pretty common in contemporary society because of how much people work.

It allowed for things to be produced much more quickly and efficiently