What do Shad's letters reveal about General McClellan and his successor? Chapter 8-9

A few days later, Shadrach sent a letter that Jenny shares with the whole family. In the letter, he expresses his viewpoints as a soldier in the opinion of General McClellan. He tells of his comrades' devotion to the General that he does not yet agree with as he does not see him as a tenacious leader that has the will or skill to win the war.