The hacker doesn't understand what they're getting themselves into, especially bragging about it. The hard part about going up against an entire nation/state is that it's relentless. The state never gets tired and never runs out of money, they could setup a team of people to 'work' on that individual and also potentially his present and future family members for a very long time. They can keep replenishing their teams with more people. The state always has a few people to spare for high-exposure targets. The leaders of that state might even forget about the existence of the individual but the operation will keep going until it's canceled... But since they forgot about the operation in the first place, it will keep going until there is some kind of broader administrative restructuring, cost-cutting or something... Which could be a long time away. Few things are more terrifying than totalitarian state bureaucracy.