Answer: He is dissatisfied and feels disillusioned with his surroundings
Step-by-step explanation:
The thing that the excerpt reveal about Krebs is that he is dissatisfied and feels disillusioned with his surroundings.
From the excerpt given, we can infer that due to the lies that he had told in the war, a distaste for everything that had happened to him in the war set in. He no longer enjoyed the things that he enjoyed.