Bitcoin does not rely on third-party institutions and is decentralized.
Without central organization, this means that even if some nodes are closed, the development of bitcoin will not be fundamentally affected.
Individuals or individual countries can't ban it. They can only limit the development speed of bitcoin
For this to happen, all the bitcoin nodes needs to be closed which is not possible practically. No one can shutdown the bitcoin. If it was possible, governments would have closed the bitcoin nodes and mining by now, but that is something not possible.