If you think your elected leaders are not competent and professional, then fire them and elect leaders that will improve the government. If you want a better post office, we need to FIX the post office, not destroy it.
This sort of argument is the one that leads to hypocritically de-funding the post office by playing politics, then since it's too political pointing to it and saying "See? The government can't do anything right", then completely dismantling it.
Other countries manage to have public services that actually work. I don't believe that the American people are somehow genetically predisposed to having a bad government.