There are a lot of misguided emotions and logic going on here:
1) Walmart is not and will never be a monopoly. Too many other stores sell similar products, so until they are the only one, it's not a monopoly. Furthermore, unless they are buying out all competition and not allowing new competition to arise, it's not a monopoly.
2) If you don't like WM, do you ever shop there? If the answer is YES, then you get what you deserve. Put up or shut up. Patronize your local stores.
3) How much money do you save at Walmart as opposed to other stores? If you compare pricing and check it out, you might want to save that $1000 a year on food, clothes, etc. If not, go support the little guy and stop crying.
4) Walmart has gone into depressed and dying areas and set up shop, creating jobs, and providing an anchor for other business to set up around. Is that so bad?
5) If all the Walmart haters would actually shop at the little guys place, they wouldn't be forced out of business.
6) Check what you buy - Walmart provides the goods, but wont sell what doesn't move. Look to your politicians for NAFTA, trade with China for cheap goods, lower quality, and less jobs here because it's being made there. Who's to blame? - Go check the Clinton administration for a lot of that.
It's very easy to hate what's successful when you feel like you are struggling, but look at why you hate it instead of blind hatred.