It's no surprise that processed foods have been vilified as a cause of obesity, disease, and the reason Americans know next to nothing about eating healthy. Generally speaking, it's safe to say that subsisting on microwave dinners and packaged pastries is going to cause problems, so this criticism is largely merited.
Unfortunately, "processed food" is one of those blanket nutrition terms, like "all-natural" and "eating clean," that doesn't have a very clear definition. Since the vast majority of people aren't farmers, they go to grocery stores, where most food has undergone some level of processing. Produce has to be harvested, cleaned, and shipped; bread needs to be baked; your favorite spreads and oils have to be pressed, mixed together, and packaged.
So before you completely write off processed foods as the root of all evil, here are some healthy staples that require a decent amount of processing.
Bread is one of the original processed foods, and though it's been shunned by many health-conscious eaters (GLUTEN IS THE DEVIL), there's no need to ban it entirely if you don't have celiac disease or another autoimmune sensitivity to wheat. There are tons of better options than just the cheapest loaf of white bread at the store: sprouted loaves and 100% whole-grain breads offer the fiber you desperately need in your diet. But bread also has to be created from scratch; wheat must be milled, then turned into dough, and baked. If you're looking for the most true-to-unprocessed version of bread possible, look for sourdough loaves that only contain flour, salt, and water.