My step-father is violent, volatile and sick in the head

There is really something wrong with my step-father's mental facilities. Seriously wrong.

Just after dinner, I quickly left the family room to go to the toilet and when I came back, he was taking my plate away, telling me how much of a "lazy bludger" I was for leaving my plate there. I told him I just went to the bathroom and was going to rinse my plate when I came back (less than a minute later), he still continued to call me a "lazy bludger". As if my presence back in the room less than a minute later was an insult to him, because it proved him wrong, but he didn't want to admit it! The idiot!

A short while after that, he started to wash the dishes. He then started complaining really loudly what a "lazy, son-of-a-bitch, dirty bludger" I was because he seemed to think I emptied the pan with the herbs I had used for steam inhalation into the sink. Of course I didn't do that, my mother did, but of course he wouldn't believe me when I told him I did not. And in any case, it's not something to get that upset about. He was acting like someone spilled their shit in the sink and he had to clean it up. It was just some wet herbs, for God's sake!

I went to the lounge room where my mother was and told her to tell him to stop accusing me of doing something I didn't do and to stop yelling at me, for no reason! She said she did it, but the idiot, obnoxious, volatile step-father wouldn't take her word and started yelling at me even more loudly, telling me that he was going to "watch me" from now, in case I threw herbs in the sink in future.

Of course it upset me, because he just continues to say really horrible things to me, saying that I am "good for nothing" and "lazy" and "shit" and just yelling at me. He then even started yelling at my mother too, telling her to "fuck off". He was upset that he was proved wrong and got even more mad that he was wrong for yelling at me, so he continued to yell at me more!

And he continued to yell, to no-one, because he was by himself in the kitchen, for over 1/2 an hour, complaining bitterly about everything. When my mother went in there to see what he was complaining about, one of the things was a bowl of cut up cabbage leaves (the end bits that I don't eat) that was going to the chickens in the morning, he was upset that it was on the sink because it was bothering him! And even when I coughed a few times from the other room, he started complaining about my coughing, as if I was putting it on or something when I am not yet recovered. What a foolish idiot he is!

He is getting more and more volatile and sick in the head.

All he ever does is yell, complain and yell some more. There is absolutely no reason for it. He is a sick man!

No compromise is possible with my family

Last night my mother came into the kitchen, where I was preparing my food for my dinner, to tell me I must get up at 8am the next morning, in order to leave the house so that she and my step-father can vacuum the floors.

I cannot vacuum anything because I am allergic to dust and dust mites. If I am around people who are vacuuming, my body immediately reacts with allergy symptoms almost immediately (itching, blocked nose, runny nose, pain in the sinuses/lungs and painful breathing). I can be sleeping and if they start vacuuming, I get woken up with pain, even though my door is closed, I am that sensitive (unfortunately) that I get so adversely affected.

So when they vacuum the house, I have to leave and go elsewhere. It makes absolutely no sense for me to get up that early, because the only people on public transport will be office workers, all primped and perfumed ready for work and being in an enclosed space with that much perfume will just make me more sick with the allergy symptoms and is not a good idea. I have multiple chemical sensitivities, so being around anyone with any perfumed products just causes my body to over-react with major allergy symptoms, tightening of my bronchi and just feeling itchy all over. My step-father's suggestion in the past has been to tell me to catch the public transport from one end of town to the other, just sit there and do nothing. He has no clue and doesn't want to understand or sympathise. He just calls me a lazy, good-for-nothing layabout because I am sick so much.

When my mother told me about the cleaning, I told her that it would be nice if there was some compromise and not just them telling me what they wanted without actually finding a compromise. The conversation went like this (it was a heated conversation - me begging her and her being so stubborn and refusing to see my point of view):
Mother: You have to get up at 8am tomorrow morning because we are going to vacuum the house.
Me: Look, I need to wash all my linen tomorrow and hang out my duvet and pillows so they can get some sunshine to kill all the dust mites so I cant leave that early.
Mother: Well we have to clean the house tomorrow and we cant do it in the afternoon (they could, but don't want to)
Me: Can we find a compromise where everyone is happy with the outcome?
Mother: There is no compromising with you, you just want it your way.
Me: You are telling me I must do something your way, that is not only autocratic but it is no compromise either.
Mother: Well we cant clean the house in the afternoon.
Me: So why cant you let me get up later in the morning, get my stuff done and then I can leave and you can clean the house. What's wrong with that?
Mother: There is no compromising with you, we cant clean the house in the afternoon.

Then she walked off to the sun room, which is where my step-father was and proceeded to tell him all about our argument in a very angry tone of voice, complaining vehemently about me to him and he starts yelling loudly that "we are not cleaning the house in the afternoon", like they are on a schedule, when neither of them are working and besides which, that was not what I asked!

A little while later, LayZ boy walks into the kitchen, obviously he heard the argument and starting telling me I was "cuckoo" and an "idiot" and "loser". I just ignored him because, really other than lowering myself to his level, there was nothing else I could do.

It is just so difficult to deal with these people.