My boyfriend loves his devildog...?

...and refuses to train him. The dog has to be sedated to get his hair trimmed once a year because he bites the groomers. He will growl at and bite anyone who gets near his food when he's eating... even his master. He scratches and digs and licks himself constantly because of his dry skin, and my boyfriend won't give him a bath because the dog doesn't like to get wet. When my bf takes him for walks around the condo, he lets the dog piss on everything in sight, including car tires, shits wherever he wants and never cleans it up. The dog pisses in the bathroom 2 or 3 times a week, and bf thinks dog is a good boy because he doesn't piss on the carpet. He lets the dog sleep on the bed, which grosses me out, because the dog stinks. He's a shih tzu and has trouble with his nose and sneezes a lot, spraying dog spit everywhere. The couch is totally his bed to sleep on, with his blanket, toys, and chew bones on it all the time. I caught him humping the pillow on the chair and made my bf throw the pillow out. I am constantly swiping grains of sand out of the bed that the dog tracks in (my bf says it's my cookie crumbs). My bf and I want to spend all our free time with each other, but I can tell the dog is unhappy when he gets shut out of the bedroom, and that makes my bf unhappy. My bf was married for 30 years, single for 20, and had the dog for the last five. I've been around for 6 months, and thought we could work out some sort of living arrangement, since we're both adults, need each other, love each other, etc. I have my own place, but I only shower and change clothes there. I sleep at my bf's every night, because we love each other. However, the dog wakes me up when he scratches and jingles his chain, when he barks at something outside, when he's under the bed scratching and shakes his head, bumping underneath. He bit me once when I got up to go to the bathroom and had to step over him. My bf is half deaf and takes sleeping pills, so the dog's noises don't bother him. My bf says "he bites me, too!" and laughs. I'm a dog lover, too, but I like well-behaved dogs. Dogs who know they're dogs. I believe dogs need to know their master is The Master. My bf says dogs take on their owners personality. He has always done whatever he wanted to do, regardless of what anyone else thought, and he has allowed his dog to do the same. Are our beliefs about how dogs are supposed to act too different? Is this relationship doomed? Can a dog be trained if the owner is untrainable? Will the dog and my bf end up hating me for wanting to keep my side of the bed clean? Am I being unreasonable for wanting my bf to clean up his dog's poo from the condo grounds? Is my bf not the guy for me? Is my need for a clean, calm, orderly homelife too outrageous for this guy and his dog to handle?