Why does my husband freak out at me over the stupidest things?

he gets mad at me all the time over the stupidest crap. we can't go one week without a fight. one night, we ran out of bread and he got so mad because i forgot that we needed it and i didn't tell him to pick it up on his way home from work. he yelled and cursed and told me he hated me and threatened me and called me names over it. then, the other night, i didn't realize there were no sandwich bags left and again...he got so angry, he grabbed a handful of my hair and pulled it so hard, that i now have a huge knot on my head. he curses at me all the time and calls me names and i put up with it. these are only 2 incidents by the way...there are more than that!! but he always does this to me and then he'll add more problems to the list like, everytime you cut my sandwiches on paper towel, there's little bits of paper in the sandwich when i go to eat it at lunch, or the meat is slimy cause we didn't have sandwich bags to put the meat in when we bought it home even though they wrap it for you at the store. then i don't clean good enough....well, at least i clean. you don't walk in and find a pig's pen here...it's very neat and clean. so i don't dust everyday and vacuum everyday....he yells at me for it and is constantly telling me what to do. he says, "your job tomorrow is to do the touchups (which i seem to have to do for every little scratch) dust the top of the fridge and blah blah blah". we have 10 cats too, which i keep clean and i take care of them...not him. i moved half way around the world to be with him, and when he treats me like crap, at least i have the cats who love me...i can't help that. well, he's constantly throwing them in my face too...saying how they always stink....which is complete b.s, and he calls them rodents and that it's disgusting keeping 3 in the house all the time cause they play in their piss then run all over the table and counter and it's getting so old always hearing that. they're clean, only 3 of them live inside and use the box inside, and the other ones live outside and i keep their litter box clean too. as soon as they crap, he lets me know very rudely as if he's gonna be sick and he can't handle it and always makes excuses. but i clean it right away...everytime. he's always complaining about how he's a robot and he works to pay off my debt...my debt was my trip back to australia to be with him when i went home to america to visit my family who i haven't seen in a year. he needed to fly me home because i got scammed out of a fly by night company and if he wanted me back, that's his duty as my husband to help me get back. why is that so hard to understand? he's not a robot, he makes rain water tanks and makes good money doing it. if he didn't want to do it, then he should've let me stay there. he's always saying i disrespect him and that i always talk over him and don't listen...yea, right,...i don't even get a word in to defend myself when he tries to blame me for something i didn't do. he always raises his voice higher and tells me to shut up and threatens to "put my head through a wall". he blames everything else for this behavior except for himself. he thinks i'm out to get him and ruin his life...but like i would fly around the globe and marry him and give up everything i had just to ruin someone else's life. someone figure it out...because i can't.