The US does this a bit, but even with that suppression of free speech, even with most mass media outlets being owned by oligarchs that are subservient to the President, the internet is still going. Europe has penalties for Nazi speech, yet the internet is still going there.
There's no comparison to what's going on in these countries to what's going on in Iran. Trying to "what about" with the US censorship of, say, the majority political opinion in a city by cutting off all federal funds that were previously flowing to the city is not very relevant. Yes, it's bad, but here we are talking about it on the Internet!
Every actor have it’s own means and tools, Iranian regime is weak and don’t have the capability to stop foreign influence effectively as US or China and other state so they use the crude methods at their disposal.
If US government was in weaker state it would take more radical measures.
There's no comparison to what's going on in these countries to what's going on in Iran. Trying to "what about" with the US censorship of, say, the majority political opinion in a city by cutting off all federal funds that were previously flowing to the city is not very relevant. Yes, it's bad, but here we are talking about it on the Internet!