Because those countries are trying to disable a currency that has the potential to drive the wealth produced in the country to overseas. Besides this, governments want to have capital control over people's money
Yeah, the main issue bitcoin is facing is that it is not getting support from the Governments of the respective countries, As Governments knows that bitcoins can demolish the existence of fiat and banking systems and bitcoin is decentralised and Government don't have any control over the functioning of bitcoins So they don't wish to stand in support of bitcoins.