I suggest you make 2 lists. One list of the good and bad things there are to being married to him and another of the good and bad things if you divorced. Its sounds like you are a stay-at-home mom, so if you got divorced you would have to get a job and STIILL take out the garbage. I know that sounds mean, but it is a fact. Unless you work outside the home I dont see why you complain about the garbage. One of your 7 kids should be taking it out. I was a stay-at-home mom and I considered myself VERY lucky. I had 4 kids, cleaned, cooked, shopped, mowed,AND took out the garbage. I didnt expect him to do anything around the house. He worked all day, sure I did too, but if I felt like taking a break for an hour or so I could, he couldnt.
You say you disagree all the time, well it takes 2 to argue. Could it be that you just dont like your life anymore and are blaming him? Most likely your kids are older and dont need you anymore and you are bored. Find something to do outside the home for yourself and you alone. Take a dance class, go bowling, learn to paint, make jewelry. Join PTA and meet other women. If the kids are old enough get a part time job..or even a full time one. Dont think leaving him will make you all better. It wont. You will be lonely and trying to raise angry kids by yourself. They will be angry, because kids dont like changes. Change your life while still with him and see if it doesnt help your marriage. Who knows, your husband is probably bored too and when he sees you changing he might try to change also.