One way was putting paid lies on social media for people like you who believe them. They have a whole stable of trolls in moscow (the troll farm) to disrupt and post lies on message boards. I would imagine some were assigned to IHUB, and by appearances, we still have some around. They are pro-trump and repeat the same untruthful talking points endlessly.
Ignorant people are not exactly difficult to fool. They had you instantly, it is the slightly brighter ones that are more of a challenge for them. All they have to do is post something negative about hillary, the bigger the lie the better, and you guys reinforce your love for trump and voted for him without question.
That is just one way how they influenced the election. I hope that is simple enough for you to understand. I am not surprised that you missed it, you were such an easy mark as far as the Russians are concerned.