Rural America is mostly a wasteland. It's either where people of means deliberately choose to live away from society, or it's people who are too ignorant, poor and/or drug-addled to have much choice. Neither group is going to be left-leaning... and that's why when you look at electoral maps, you see all that red.
Pick a highway, any will do, travel along it and tell me what you see. I already know. One little failed town after another. They might have a dive bar or ancient gas station, but most commercial buildings will be long abandoned. If you need anything, you'll have to find a decent city with a generic walmart, dollar general, mcdonalds, etc. Long gone are the mom-and-pop grocers, general stores, etc.
The irony is these are solid red Republican districts. Cities have major problems too, but they are full of action; plans, projects, hopes of a better future. There is no future for the average rural American.
They are frustrated and angry, as well they should be. Too bad they can't see the forest through the trees.