If the government can transparently MITM your HTTPS connections with the DoH server, they can just as well MITM your connection to the real antigovernment.com server regardless of what DNS you use. And in fact, if they can't MITM your connection to the real antigovernment.com, they also can't trick you to talk to their fake antigovernment.com regardless of intercepting your DNS: you will connect to the attacker IP, the attacker IP will give you a bogus certificate, your browser will refuse to connect.