No more ambition

Basically, what the title says I really don't have any ambition now that I am out of school. My job sucks, pays me nothing, and is so mentally draining that I almost regret going to college I cannot find a good job to save my life. I have internship experience within my field (Marketing), previous managerial experience, and my current job in marketing, but I can't even land an interview to get me out of this one. I wish I never went to college; it stole all of my ambition.