IMO the Op doesn't want to do anything about her situation. It sounds like a teenage vent to me. Even the title "my inlaws are difficult to live with" doesn't suggest anything more than a vent.
It could have been "wanting to move away from inlaws" and therefore people offering advice on what to do in order to make that happen but instead it's more about highlighting how horrible life is being stuck in that position.
I say let the kid vent but if it's frustrating offering advice then don't. I have no advice to the OP (don't feel like she wants it anyway) but thought I could help some people who are clearly frustrated by the thread. You all mean well which is nice though.