The state takes a portion of your money and decides for you how it should be spent, imposes innumerable restrictions on you, and destroys your life if you disobey. On top of that, not only is the public sector less efficient than the private sector due to the lack of competition, private entities are burdened by unnecessary regulations. The justification given for this is that it improves the average well-being in several ways. But what if all the human effort spent on government is actually harmful? What if we're better off using it elsewhere if we want a more fair and prosperous society? That is what this FAQ aims to convice you of.
Yes, every four or five years, a single government is elected that does every single one of the thousands of government functions. Voters don't perform a careful analysis of how efficiently these thousands of fuctions were performed compared to the previous ruling party. Since these governments also have the power to make various laws with sweeping societal effects, here's what actually happens:
Figure 1. "Think of how stupid the average person is, and realize half of them are stupider than that." – George Carlin, who didn't use the word 'median' to avoid confusing the average person.
Thus the incentive for the branch performing each function to do so efficiently is extremely small. A highly specialized and efficient agent is hindered by having to join, obey, and share in the outcomes of, this inefficient behemoth. In a libertarian system, the sole function and power of the government would be the enforcement of the NAP. This is best done at the local level. Any subjective laws passed will be based on local opinion, eg., laws protecting those incapable of consenting (children, the mentally disabled, etc.), laws against endangering others' safety, etc. The best performing government in each region can be elected, as opposed to the best one averaged across all regions. This is why libertarians want powers transferred from the federal to the local government.
A government not supported by the majority cannot sustain itself without tyranny. They will eventually get rid of the current government and laws, even amend the constitution, if needed, to get their way. Thus it is impossible to maintain libertarianism by restricting voters or their power.
To achieve a libertarian country, either the majority of people in an existing country must be convinced of its merits, or libertarians must come together to form a new nation. And if the majority is libertarian, they will vote as such, maintaining the minarchy.
The current system is dominated by government action, so fixing problems often requires even more government action. This does not say anything as to the feasibility of a fully libertarian system. Private entities take time to develop and immediately dismantling entire government institutions may not be the best move, hence why companies benefitting from government aid and intellectual property also need antitrust legislation, and why suddenly cutting subsidies/welfare can hurt a lot of people.
Anarcho-capitalists advocate for private (self/community/corporate) enforcement of the NAP, thus eliminating the government entirely. Doubts as to whether this will leave more people unprotected than a government solution keep people from supporting it, but this minarchist FAQ can be extended into an ancap one if/when sufficiently convincing arguments are collected.

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