Are you actually making an effort? Looking for a job, helping round the house, etc. If you're not then I can understand why they're so pissed off to be honest, it must be frustrating for them. However, I don't think it's fair to blame you for making them shout. They're shouting of their own free will, you're just the trigger.
I think if you want to make things better then you're going to have to get your act together, ie not lazing around in bed all day and doing nothing. It would definitely help to improve the situation if you offered to help out whenever you could and just made their lives a bit easier.
I don't know your situation properly from what you've said there, but I reckon you must be partly to blame for the arguments, don't you?