I get angry very easily, I always feel stressed out, and I get so frustrated over every little thing. Advice?

I live in a house of stressed out people. I have 3 five year old brothers that seriously torture my life, and my parents don't do anything about it. I'm a 19 year old man and I get so annoyed and irritated at everything. At work I feel like I wanna punch a whole through the wall because I work with ignorant, self-centered people who walk all over me. What should I do to fix this? And please answer seriously I'm trying to get help here. You might think saying "Get laid", or "Don't stress and don't get angry" is funny, but it's just a waste of my time and I'm seriously looking to change things as soon as possible.