Various Government of the world are almost run by the old guys with mindset of old fiat currency system, therefore they would like to stick with the system they understand rather than adopting the digital new money system "Bitcoin" and cryptos, which some of them see as a threat to get them out of power control and their jobs, Pricisly Central Bank, people that are working in the banking sector could see Bitcoin as a threat their jobs without understanding how Bitcoin works.
The only problem with the government is the transparency of the financial markets, they want to protect interests by controlling.
However, Bitcoin is a decentralized asset that was created to provide a solution to the problems of the existing financial system. The open and transparent nature of Bitcoin will not be controlled by the government. Governments don't want something they can't control, so they don't like Bitcoin.