Why are Soldiers quick to complain about NCOs and officers (until they get in their shoes)?

I recall, as a lower enlisted soldier, bitching about some sergeant or junior grade officer, being a jerk, when we were ordered to do different tasks. When I was promoted to Sgt. E-5, and made squad leader, I soon learned how different my role in the unit was now. Now, I was responsible for my squad and our role in ensuring the mission was accomplished, and accomplished at a high standard. I did try and take what I had seen from those who commanded and use the best practices I observed from other NCOs and officers. I also tried to avoid those practices that I felt were demeaning to the soldiers in getting the mission accomplished. The responsiblities increased when I was promoted to SSG and became ass't platoon sgt. Now, I was responsible for teaching other NCOs and more soldiers, but the focus was unchanged. Get the mission accomplished, but try and do it where no one was alienated. I found that keeping soldiers focused and not upset made for better moral and thus, fewer problems in accomplishing the mission.

The only thing that would address this is to own your mistakes. Don't let ego get in the way. None of us are 9 years old, with the perception that adults are infallible. If a soldier believes that those in leadership are completely incapable of the screw-ups, leadership has an obligation to allow them to correct the misconception. And most importantly, to let them learn from it, without stigma.