So did we. The principle articulated in the Declaration of Independence that people have a right to independence from a government they see as oppressive, has been destroyed. The Federal Leviathan has established supremacy over the states, and the Government the founders created has been replaced with a much larger and more malevolent beast.
A whole host of modern issues that bedevil us are the consequence of that war. Among them are Abortion, "Gay marriage", Citizenship for illegal aliens, ban on prayers in public schools, excessive public debt, and the destruction of the "natural born citizen" requirement for the Presidency.
Would love to get over it, but I am constantly reminded by the modern issues of the day that the consequences of it are still with us.
I think it has much more to do with the 17th amendment and not the desire of a bunch of slave holders wanting to maintain their evil economic system in a supposed free society.