Who said that you can't find good wine at the supermarket? It is possible to try the pleasure of tasting a good wine even without going to a wine shop.
It is not true that drinking quality wine is for the rich. With a little attention, you can drink well without emptying your wallet.
Various large-scale distribution chains, following the evolution of tastes, are now able to offer good quality products at affordable prices. It is a necessary choice: most consumers buy wine right at the supermarket.
Many wineries, then, include among their labels those explicitly dedicated to daily consumption: wines that do not reach the top of the charts, but can accompany the meal adequately.
With a little skill, and even with a little luck, it is sometimes possible to find some nice surprises.
Wish you a nice taste, cheers!