I’m going to address a single point here; these people grievances are at this point, unfortunately, the consequences to their own actions.
Hillary had a clear path for moving these rurale areas into future looking manufacturing jobs, and people who would have been helped by those exact investments laughed her off and voted for Trump in trove. Then Trump closed plenty of factories while just boating he’d save jobs the same days those jobs were laid off.
The government didn’t fail them. They failed the government.