I am thinking that my life is slowly going down the sewer! I am so fed up with this situation in which I have to work in two shifts and still cannot earn enough money for a normal living. Am I incompetent or what? I mean, I know people of my age who already started their own business; they're their own bosses, but still...
You should slow down a bit. And perhaps start being a bit smarter. You work two shifts, ask for a raise! I mean, your boss/bosses surely know that you are working hard, but there is a rule applicable to most of the companies and firms -if you do not ask you will not get it-. So, you might have same situation with the lack of free time, but you will earn more and that is some kind of satisfaction.