I cannot imagine how utterly frustrating it must be for them to watch the media bounce from story after story in some convoluted attempt to explain why they voted the way they did - from Russian hacking to white supremacy to Facebook ads to Facebook data. This is just one more in a long line of justifications when the most likely reasonable explanation is that he is beloved by millions, not just in the USA but around the world.
The same goes for Brexit.
"Your side won because the Russians and this data company and Facebook made you vote that way. We're going to make sure this never happens again!"
It's unfortunate that in the aftermath of polarizing and controversial decisions like these, this kind of rhetoric will now drive people further apart, because one side refuses to accept the reality of the other's opinions, and dismisses them with conspiracy theories.
Today people are pretending to be shocked that Facebook shares data with apps through the developer API. Most of the permissions being talked about were removed a long time ago. What is happening now is basically vindictive hatred for Facebook from the tens of millions who feel wronged and cheated by electoral results that they lost fair and square.