Hardly. Sherman crippled the Confederacy’s will — and ability — to wage war. Which is precisely what he set out to do.
By the time he reached the coast, and even before, when Atlanta fell, the Confederates should have recognized that their cause was lost, and that all they could do was forestall the inevitable.
He proved that 20 million people could eventually overcome 5 million people if given enough time, no matter how hard those 5 million fought to defend their land and homes.
Of course Adolph Hitler proved much the same thing during the subsequent century.
November 1864 it was all but over. But usually the worst fighting comes at the very end (see Iwo Jima and Okinawa) and April 1865 was still a ways off.