No, but it took 5 years and hundreds of thousands of deaths to force surrender. Would you have described the Axis powers as weak and ineffective in WWII? They never had a chance against American military and manufacturing superiority either.
The interesting thing is, that most really do not know how the war actually ended.
On 12 April 1864, the Confederate Army did not surrender, nor did the CSA. The only unit that surrendered was the Army of Northern Virginia, which was around 50,000 men. Now that was about 1/4 of the CSA military, but there were a great many units still actively fighting the Union.
However, what followed at that point was like a snowball rolling down hill. With the Army of Northern Virginia gone, there as nothing to stop the Union forces from taking the capitol of Richmond. Then on top of that, the assassination of President Lincoln just two days later.
That shocked and appalled many in the South, as they had already learned the generous terms he was asking for. No trials for those that had fought, no purges of leadership. Simply for the soldiers to lay down their arms and go home.
And Appomattox was not even the largest surrender of the conflict. After a series of three meetings between General Joseph Johnston and General Sherman from 17 to 26 April, General Johnston surrendered his forces numbering almost 90,000 men. Who even ordered Union forces to give the former Confederate forces ten days of rations so they could eat on their way home.
But a key thing that the CSA shares with the Germans and Japanese of WWII was the belief that they were so superior to their foes that their lack of numbers or equipment would allow them to prevail. And less than a century later, Japan would follow almost the exact same battle plan with the exact same results. Thinking that they could lure the US into a single decisive battle, and so badly defeat them that they would withdraw from the war.
And interestingly enough, this video just dropped less than a week ago.
In short, it is the experiences of WWII German POWs that were sent to the US for internment. And how it completely shocked the German forces who were now in captivity. How single states in the US were producing more food than the entirety of Germany.