I'll attempt to be brief:
1: The civil war was not, by definition, a civil war. The south never fought for control of the north. The definition of a civil war is both side fighting for control of the whole.
2: The states joined the union of their own volition, they weren't conquered. The "Civil War" changed the notion of free states. Now the states are subservient by force to the federal government.
3: Lincoln didn't free the slaves. The Emancipation Proclamation decreed that slaves in rebel states were free. Slave states loyal to the north got to keep their slaves. So, Lincoln freed slaves in lands he had no control over.
4: Lincoln oversaw the first national conscription law in which the government is allowed enslave citizens to war. You can't be a free country AND force people to their death.
Lincoln is popularly considered the angel of liberty to an enslaved people, but in reality he did more to enslave all of us to an all powerful federal government.