In this day and age that is pretty hard to do unless you live on a farm iwth your own cows. get real, we are not in Amish country.
Not all that difficult if you shop the fresh food aisles only, stay away from fast food, food in a box, look for organic fruits and vegetables.
It’s hard to do ? Maybe for lazy people or those with no imagination.
Step 1 - patronize local produce store and buy in mass quantities from local producers.
Step 2 - freeze or can excess vegs.
Step 3 - buy beef and lamb and chickens from local grass-feeding producer or 4-H club and freeze.
And there you go. Simple, really.
If you have more gumption and initiative you can grow an entire year’s worth of produce in 4 3x3 ft raised bed gardens. Look for the book “Square Foot Gardening” and read from cover to cover. Even someone with only a rowhouse-sized backyard in the middle of a city can grow in quantity.
Of course if all you can do is complain then you will get whatever anyone else wants to put in your food. Good luck with that.