Never happened to me. All of our NCOs were pretty courteous and respectful of the rank even knowing that we're glorified privates.
But at the same time, half of my class were prior enlisted so that might have had something to do with it.
I can honestly say that I've really enjoyed working with the NCOs I've been around. Very few times have I even seen a substandard NCO and none of those worked directly with me.
Hopefully, I experienced the exception and not the norm. There are a lot of solid NCO's here. I work with a few of them evey day.