Ask for a advice

Hello, I'm 19 years student in a university. Nowadays, I'm preparing to apply for master's degree to study abroad to get better education (because my current university is a trash, and do not have a laboratory). I am from an ordinary family. Our family have family business which have problems every year. In addition, I have three siblings. Every season, our parents argue with each other, I'm exhausted of it because it happens every. After argue, my dad leaves us and these makes our live harder every year, because I have a little sister who needs supervise. During studying in second year, every week I was going to my hometown which lengths 1200km there and back, and no one could supervise my little sister, because my mom was at work (in a family business). Even if, they do not argue with each other; they put their responsibilities on our back every single year, which makes hard to lead your goal. I feel like, I don't have freedom, and feel like myself in infinity prison which I cannot leave. I see others parents, and wonder, when we can live a peaceful life like them? Their parents at least do not put their responsibilities on them, and make their life easier. Now, I think my parents don't give a damn about our dreams, goals, personal life, because they are focused only on their argue every year. I just want to pursue a top education, make my dreams come to reality, and improve my own country so they can live a better life than I have now. I'm tired everything of these. And, I ask for your advice, how can I get my freedom?