When you accepted the job, whether it was half what regular university employees make or not, whether it has good benefits or not, you accepted the working conditions of the job. Kicking and whining and complaining about the work, the benefits, the pay after you get hired is not going to solve or make any kind of statement for the condition of the American worker as a whole. It's just going to get you what you got, which is fired. There are a lot of people unemployed right now who would probably be delighted to have this opportunity.
An hour of undisrupted lunch break is not a protected right. By s******g off to your employer who called you during your lunch break, and refusing to come back in when he asked you to, I'd say the decision against you will probably be that you were fired for insubordination. Had you had any prior warnings about your attitude, your lack of respect for your supervisor, and your general superior attitude about your job, that you were too good to have to put up with this miserable lowclass job, it will be leaning even more in your employer's favor as far as unemployment will go.