That is most unfair. Most controllers bend over backwards to be accommodating and helpful.
I would venture to suggest that some of the small number of negative comments on here, ostensibly from controllers, come from people who either have not controlled for some time or have never controlled. (Though I rush to add that the one person who has been identified as a retired controller, TDM, always gave exemplary service when he was in Thames.)
That is the nature of anonymous forums. I hate the Secret Seven names and the ability to rush out, stick your tongue out, then run back and hide behind mummy's skirts, especially when you are doing a Sandie Shaw imitation.
That is why I always fully identify myself, so that I have to stand by what I write and my credentials can be checked.