This is a non-exhaustive list of things that are wrong with our food system:
1) Fresh and healthy fruits and vegetables are more expensive calorie for calorie than corn- and soy-based processed food, because of unfair farm subsidies to corn and soy farmers.
2) Distribution networks rely on artificial preservation processes such as the use of emulsifiers, which, though many are in principle not unhealthy, usually come from Brazillian-grown soy, which, by the way, is slave-produced
(http://www.mongabay.com/external/slavery_in_brazil.htm)
3) Areas with stores that stock healthy food, i.e. non-processed, organic, fresh, and/or healthful are always areas with rich or white people. Trader Joe's is only in yuppie areas. Whole Foods is *definitely* only in yuppie areas and has prices out of control. Again, google "food deserts".
4) The FDA is a joke. The commsioner on food safety used to work for Monsanto. And so the door continues to revolve. Meat packing has become so unsanitary that even produce is now sometimes contaminated with diseases like salmonella. The best they can do is contain outbreaks. You can't even film inside of a meat packing plant, the conditions are so bad.
5) Farmers themselves are either overpaid by subsidies and amount to rich executives, or completely in debt to their primary customers, the food giants (Cargill, ADM, etc.). These companies provide them with equipment (which, by the way, they mandate that they buy) and then put them in debt to pay for it which they never escape.
5.1) The food system is an hourglass - lots of players in direct production, farmers, with no power (especially not now that they can engineer seeds to not plant after one season and sue you for using different seeds), only a very few powerful players in the middle that face basically no scrutiny - food giants and agribusiness. And then it trickles down to consumers who have extremely limited information. This is a food system where agribusiness can lobby their way out of fully labeling the food they sell you.
Given all of this and the runaway obesity rates in this country, it makes talk about "personal responsibility" extremely unhelpful. You continue to preach, and yet childhood obesity continues to rise. Blaming the whole of America's families and consumers doesn't seem to be helping.