So many all depends in saying no to the local supermarket, whatever it is called. Depends where you live and whether there are enough alternatives. Depends on what you can grow for yourself, whether you can get onto the internet to go green shopping, whether you want to buy in bulk through a local co-operative group, how healthy you are for hunting up shopping outside the supermarket, how much time you have outside the job that produces the money, how much time you have to cook for yourself, the price of gas and electricity, what sort of income and transport you have ...
Surely not everyone here is 100% fit and able to grow their own, living in a larger town which has a variety of smaller shops providing food and household goods alongside the supermarket as well as having a thriving farmers' market and a normal market?
If I didn't use the supermarket here I would live on bread and vegetables. Well excuse me but I like to clean myself, the abode and the clothes. Even if I jump on the bus into one of the next towns, I would still not be a lot better off as there are only chains like Holland and Barrett which sell extra staples and Oxfam (yes it's a chain store even though it's for charity) which sells household cleaners at the moment (Bio-D). Sure there is a butcher, fishmonger and baker there - two no use to a vegetarian of course ...
OK so I so shop on-line for a lot of green cleaners because they are cheaper than the supermarkets here (think soda bicarbonate, vinegar and such like) even with a delivery charge. But that is a price choice due to being an improvident person who never saved up and so only has a state pension

And if you shop on-line rather than in the local supermarket you are rarely supporting a small business which compares to a small, local shop are you?
As for local small local independent clothes shops

all for 16 year olds or at one heck of a price for Madam who does nothing but give dinner parties and arrange posh charity events. There are some times when you can't make it or get it from the charity shop which now charge prices comparable to those of T***o and Asda. Ho hum.
And it's not the very recent arrival of T***o two years ago up the road that has caused this situation - it's the fact that the local shoppers in our town and the one next door didn't support the independent shops over the last 40 years when they were here. So they shut for lack of custom.