Since I was 12 or so I have helped out in my parents' business. Due to the fact that this particular type of business does not make as much money any more I help out a lot more than I used to. 
I am now 25 and have my first proper job having finished college. I often work about 20 hours a week for them for no pay although I do live at home. I would much prefer to pay rent and be worse off financially but I don't think they would accept this at all. 
My dad has another really high pressure job which takes up literally 100% of his time which means he thinks the rest of us should chip in and do whatever he asks and whenever he wants. This has caused me to feel huge resentment towards him. We are not so much a family as work colleagues who can shout at each other anytime anywhere.
 I'm sitting here on a Saturday at the empty business. I don't have the autonomy to decide what I want to do with my day off and tomorrow will be the same. I can't pursue hobbies in the evenings and I feel like my time is being robbed. 
Also this commitment has meant that I commute over an hour to work so that I can come home most days and help out. 
I'm at my wits end. I plan to move out next year but worry what my siblings and family will think and whether they will even talk to me. I am thinking of going to therapy to figure out solutions to the situation. 