Weaken democracies around the world to create an oligarch class that Russia can manipulate behind the scenes. Basically dictatorships by another name. Trump would give the reins to somebody else and it would continue as Russia lowered the standing of the world to be on par with them.
Honestly its always been democracy vs dictatorships. Putin can't beat the west so he wants to make the west like him....... kind of like the Joker in the Dark Knight. Some people want to see the world burn cause they been burned themselves.
Big picture, there's already an oligarchic class in this country that's become strengthened for 40 years and has been turbo-charged with all of the tax cuts, deregulation, de-industrialization, destruction of the labor movement, etc
America is at a paralysis politically because of this class.
Russia and whoever else taking advantage of it with low cost campaigns shouldn't be a surprise.
America has to look at itself very critically.