Answer: I believe processed foods have garnered such a great media criticism because its fast, cheap, and convenient and of course yummy. Its way cheaper for companies to use low quality ingredients combined all together to make a product vs spending more money on higher quality ingredients.
Most processed foods contain high amounts of poor-quality fat, tons of added sugar and salt, and they are very low on the amount of fiber and nutrients we need, If we consume a high amount of these foods it will increase our risk of tons of diseases. That's why i think social media criticizes it so much, although everything's okay in moderation.
Personally, I believe some of our food is safe but definitely not all, even our vegetables are sprayed with chemicals and our condiments are stuffed with sugars and artificial flavors all these things have effects on our bodys.
Again this is a question that has a lot of conflict but yes I do feel that the pesticides that are sprayed on our produce and the added antibiotics are bad for you. They are sprayed with chemicals our bodys don't need which could cause these diseases listed. Although it's not "proven" I try to stay away from them just in case.
hopefully this helps a bit :)