You need to have a new job. In so many ways. I got a sysadmin "internship" right out of college with a studio art degree (painting) and was make $3K a month. And for a company that I feel is extremely exploitative of its workers. I completely agree with everyone. You can feel completely entitled to making 4-5 times what you are, salaried with benefits.
Also, your boss is obviously just an ass. Only someone on the megalomaniac end of the personality spectrum would be calling you to task for showing up a few minutes "late", especially when you are a contract worker.
