Currently I have a friend who is being driven crazy by the shittiness of their job. They have no breaks, no lunch and get no respect for the work they do.

While this is not impossible to live with she would like to quit and look for other work but from my understanding one cannot go on unemployment when they have been voluntarily unemployed. Additionally, she wants to be sure that her employer doesn't get away with sub-par employment conditions in the future through consulting with the labour board or whatever governing body is appropriate.

Can somebody who's been through something similar help me out with the laws around this? What can she do and how should she go about doing this?