I've bought nearly all my food for a few years from my CSAs, farmers markets, and food co-op. Nothing from any of the companies listed in the article. Much of the food I know the farmers and vendors.
As a side effect, the last time I emptied my garbage was Christmas 2019. I buy almost nothing packaged. I calculated my annual food expenses and it's a bit under the national average, but that includes feeding at least 50 other meals since CSAs provide so much food.
For people who don't have access, I've led workshops to people in food deserts, but the most effective way to improve access for others is to support CSAs, farmers markets, and food co-ops yourself.
If your area lacks them, it takes effort, but my family helped form a food co-op when I was young and it has become a cornerstone of the community. Every community benefits from healthy, delicious food.