I've read a few accounts of Wehrmacht veterans. Most seem to be submitted by German soldiers, commissioned or enlisted, who were largely apolitical. I their view, they were merely good soldiers fighting for their nation.
Wilhelm Pruller has submitted the only narative that is blatantly pro-National Socialist. In this diary, Pruller, an Austrian, shares his experiences in several campaigns. Most notably the invasion of Poland, and the final defense of Germany. This book gives one a bit of insight into the attitude of an average Wehrmacht soldier (in this case a junior officer) who was enthusiastic about Hitler's regime.
Pruller apparently shared the delusion with his fellow nazis, that somehow Germany would be saved by some undefined miracle. Where most Wehrmacht and even some S.S. members realized that Germany was finished, the fanatics were intent on beating a dead horse.
Certainly Wilhelm Pruller is deceased by now. The information on the author in this book stated that he was an alcoholic, living in Vienna, at the time of publication.