When I wrote my first manual, somebody wrote a really nasty review of it.
My well-meaning co-workers and mentor tried to keep it from me.
I found it by accident. I was absolutely thrilled. Somebody cared enough to hate my opus! I made that much of an impact! Of course, my reviewer was a dumbass who knew nothing about industrial software and wouldn't know a good manual if it bit him in the ass, which is pretty much what happened, but still, I made a difference!