It did make Tunisia a bit more democratic since Ben Ali left, which is where everything started. But Egypt, where all the US reporters rushed to witness the "revolution", is back to a US backed dictatorship, Syria is in shambles, Libya is in chaos, Nothing changed in Morocco or Algeria. And curiously nobody on Facebook or Twitter was talking about the violent revolts inside the gulf monarchies that were harshly repressed by their respective governments.
The way you describe it, it's as though American social media companies were used as tools to further the geopolitical objectives of the United States and its allies.