There is a natural expectation for parents of adult children to hope they will either pull their weight in the household and share the same values if they live with them or find a way to get out on their own to live their own life. Now before you object to what I'm saying I am not justifying what your parents are saying or doing, as I do not have first hand experience of what is going on.

Your parents may be between a rock and a hard place in the sense that it is clear they are not happy with something you are doing or with the situation but are bound by their initial promise that they would let you live there "forever" It may be nothing short of that you are all butting heads because truthfully it would be best for you to get out on your own and move out (which I realize you are working on) but having framed the situation as if being parents that are ok with you living there forever, they are hard pressed to say they may just want you to live on your own now. And this may be their dilemma causing a lot of stress and frustration in their minds. And it's coming out as rude, sometimes dismissive attitudes. I know, I may be way off, but I'm speaking as a parent myself of adult children.

Again this does not justify their behavior but trying to give you some insight to what they may be thinking and feeling. it may or may not be possible but having an honest conversation of what it is that they are frustrated about may help. if you did this approaching it without being adversarial or accusatory, it may surprise you to find out what they are thinking. Just a thought on possibilities. Either way going through life frustrated and angry is no good.

You are working on moving out already and that's ideal in almost every case of adult children at some point so this is good. spending too much time worrying about the "consequences" when the time comes is useless. it may or may not be a smooth transition but being 6 months from now why not spare yourself the stress and put that in the folder with "bridges to cross when we are at them" ?

As for the time being, if you opt out of having an honest conversation which is a completely acceptable choice, then find ways to limit the time you have that will risk uncomfortable situations. find way to stay out, or away, give both parties time to have some peaceful solitude. I don't know how hard that would be but it's worth looking into.

hope this helps.