I agree wholeheartedly that the Russians were not innocent bystanders in the 2016 election. They worked at full speed.
I don't think they wanted Trump in the office per se. I believe that they really wanted discord in American politics, so they could make their moves without resistance from a unified nation. Look what they're doing in Venezuela.
By the way, Collusion happens with Russia. Obstruction would be Trump's own action, and as such, cannot be served by a Russian cook.