Misinformation begets more of itself, it's propped by a basic lack of media awareness, using simplistic and repetitive word choice, along with extreme choice of words or phrases to foster support/contempt, and displaying "balance" by using straw-man arguments. Couple that with media consumers who quickly want to digest information without much question, are constantly bombarded with information, the idea that people are naturally lazy and will seek out few sources before becoming weary; the desire to be "part of a [media] team" which creates loyalty and acceptance through brand recognition. Then there's a lack of middle-school mathematical concepts (percentages, permutations, probability/chance, estimation), misunderstanding of basic science and biology concepts, let alone physics and chemistry. A massive gap in understanding historical and economic concepts not just as "memorized facts equal absolute truth", but also due to psychological, emotional, and philosophical differences; these are generally seen as "weak" things to understand and therefore frivolous to spend much time upon. Throw in religious, family, tribal factions, a middling sense of total cultural experience, along with the desire for greed, power, and status and you get a lot of the reasons things are going the way they are.