what's wrong with my family?

my family argue all the time. I get that all families argue at points but my family will easily shout at each other more than 30 times a day. I'm 15 and sitting my GCSEs in 3 months and this is preventing my ability to revise. I can't deal with t anymore. I try to stay out of it but the negative energy takes a toll on me. I can't tell them how I feel because every time I have in the past they get defensive and push the blame around, no change ever happens. I don't see why it's so difficult for them to show a little empathy or put themselves in mine and my siblings shoes. they have the shortest temper and just snap. they atmosphere in our house is so inconsistent. I get that they are probably stressed about things like money and our well being but they take it out on us and I can't stand being at the house at the moment. Is it my fault? I really don't believe I've done anything wrong yet nothing seems to be good enough for them. I'm the oldest out of my siblings so I won't have to be at home much longer but this is starting to make me feel depressed. I feel like my younger siblings will end up feeling the same way in the future. I'm out of options on what to do. I feel bad for complaining because I get that some families have it a lot worse but this is really pushing me. I just feel trapped and its taking a toll on me. I just feel like it's all my fault. Thank you for taking the time to read this : )