Arab Spring ?
Only worked where there was no real control or monitoring of the internet. And it taught other governments. You think anything like that could be organized in China or Russia... or Iran? Iran tightly monitors the internet.
Your take on this is bizarre. Decentralized communication is so much harder to control than, say, state-controlled media: television, newspaper and radio. For the latter, you just have to send troops to occupy the location and broadcast out your version of the news. State Internet Service Providers CAN block sites like Twitter.
But everyone knows state media is BS in a dictatorship. They don't trust it. The way you deal with social media is to A) block content based on algorithms which can monitor 24/7, B) arrest those who post anti-government views, and C) post pro-government views by 'ordinary people' to counter what few anti-government views get through the system.