Why does your nihilism stop there? Name one armed revolution that has fixed the problem of corruption in the history of the world. You can't -- we had one 200 years ago and look where we are today -- a total failure by your very own definition.
Your entire argument boils down to defining the situation as unfixable and then dismissing anyone who says otherwise. You aren't even a glass half-empty kinda guy, you are a glass is a bottomless pit kinda guy. Good thing people like Upton Sinclair, Martin Luther, Martin Luther King, Mohandas Ghandi, Nelson Mandela and tens of thousands more weren't nihilists.