Why are people so irritating sometimes! ( family of pacrats)?

I wanted to ask, why are people so stupid, but that seemed too mean.

My family membes, though I love them dearly, are especially obtuse at times.

I am an orginized person and I try to think logically most of the time. I understand logically that by having a clean space it is more comfortable and useable, so I keep my space clean. Sure, like everyone, I'll a have a few lazy days where I throw my laundry on the floor and just don't feel like cleaning up but in the end I never let it get too out of control. The entire rest of my family on the other hand, are the messiest people that I've ever known. piles of things from before I was born are never gone through and never thrown out though my parents keep saying they mean to get to it. My teenage little brother lives in the tv room claiming he is uncomfortable for some unknown reason sleeping in his room. I tell him if he cleaned it up it would become his favorite room in the house. He says the mess is not the cause and even that he prefers it that way. But really, his room reaks and you can't even open the door all the way because of all the clutter and his bed is also covered in stuff. My parrents are admitted pacrats mostly out of lack of motivation to clean it up and sentimental attachments. To my brother, on the other hand, EVERYTHING is sentimental, even trash and empty boxes he thinks could be useful so he adds to the pile. I really worry that out of everyone, my brother is the most likely to become a full blown hoarder, out of extreme laziness and unwillingness to do any form of work if it isn't Xbox related.

I'm not germophobic, but being in my situation is like being excruciatingly germophobic while living in the city dump. My room is the only nice place in the house, my parrents constantly complain about the home not being what they want it to be but do absolutely nothing about it. The mess and excess crap is what keeps, and has kept as long as I can remember, our house from being a home.

What do I do to keep sane until the beautiful day I can afford my own home?