So, the German soldier in the OP called the American Troops "amateurs", because they used superior weaponry, tactics, and personnel to stop attacks and launch counter attacks? It seems as though our Jerry friend thought it was rather unsporting, eh?
Seems rather glass house, to me. I bet those hauled to concentration camps in cattle cars, who were either slaughtered or tortured, probably didn't think it was very sporting of the Germans to do that.
Fuck that guy.
The fact that he survived the war to bitch and moan about it, tells me when didn't use enough artillery and air power in his area of operations.