I think the opposite is true. In the 2016 election, we saw people get trapped in information-bubbles. The internet allowed far-right/alt-right information sources such as Breitbart/Infowars to manipulate people and gain a wide audience.
Similarly, there has already been substantial evidence that the Russian government used a variety of techniques to spread false information through the internet.
To say that the internet decreased the amount of false information in the 2016 election is misleading and false.