First, make sure Bitcoin is seen as the bad guy everywhere by everyone. How hard is it for the FBI or CIA to pretend Bitcoin has been found to empower one of the largest criminal network in the world? Ensure mainstream media coverage all around the globe. This is enough for Bitcoin's Market Cap to already drop substantially.
As far as I know, they have done it including the Fed, government efforts to fight Bitcoin in any country have always failed, with various FUDs being carried out, ranging from regulatory issues, mining bans, trade bans, environmental issues, CBDC, and other news to fight Bitcoin including What do you say. It was only effective for a few months, and I've noticed that after the crash bitcoin always bounces back and more and more people are using it after the news wears off.
I don't think there has been an organized FUD covering the whole country to boycott Bitcoin because if that is done it will be a boomerang for the government itself, because ordinary people will know about it and will certainly raise curiosity about what Bitcoin is, and as I said it will only be effective a few months and surely Bitcoin will rise again.
shut the Internet or Electricity grid for a matter of minutes. Yes, minutes of national Internet shut down or power cut I think could have a very serious impact on Bitcoin's credibility.
If it is turned off only in one country, it will be useless, considering that Bitcoin has an international scale. It might be more effective if the scope of the blackout had to be done on an international scale, then it would affect Bitcoin's credibility. And I think it is impossible to do because it will have an impact on the stability of the order of other sectors.
I think if the Internet still exists and electricity is still used around the world, there is no way to fight Bitcoin other than adapting to it.