For those soldiers who felt that the people they were protecting didn't truly appreciate them— expecting them to sacrifice their lives without batting an eye, treating their sacrifices with indifference— disappointment and even despair would naturally take root. Some became resentful and began to question, while others would choose to push forward. Some, upon feeling utterly hopeless, would choose to leave.
In the grand scheme of things, there is no right or wrong in this situation.
They happened to have encountered such people, but it's unfair to lump everyone together. There were still many in this country who were rallying behind and passionately thanking them.
One could put the blame on no single person as to how things have developed to this extent.
Even though Flossie was part of it, perhaps, having experienced too many such situations, or perhaps because she has lost much of her feelings, she did not have too many thoughts about it, nor made any judgments.