Even if the US Intelligence services are right, and that Russia did influence the US election, I think it is a stretch to say that it was that influence that got Trump elected -- you can have it both ways.
I think it would be pretty clear that nobody, the Russians included, expected Trump to actually win -- the goal was merely to make Clinton (and, by extension, the US) look ridiculous and perhaps redirect some of the incoming administration's attentions in directions other than towards Russian interests. In that, the strategy paid off in spades, except that I'm sure that the Russians are just as worried about an unpredictable Trump administration as many of the American progressive voters are.