Feedback is...
a personal thing. What one thinks of as bashing may just be another expressing an opinion of their perspective of the interaction. Two people will never leave the salad bar with the same stuff on their plate. Two people may express their sides of an interaction from a completely different perspective and both can be right even if they completely differ, such is the human condition....
However anger and bitterness does seep through when that feedback is read by anyone as the written word may not fully express the tone of the words which may come across as harsher than it was intended. It may come across as a personal attack on that reader. Not to mention that if all of the readers other feedback is positive that may in fact make the client look badly so if you want to express your perspective as is your right as a paying customer there is no need to name call, or sound bitter, it negates what you have to say and may in fact prevent other readers from taking your calls, if they fear that you will do the same thing to them.
I personally do not avoid taking calls from callers who have left negative feedback, as that may not be my experience with that caller. And I know and understand what it is like to wait for a call, spend more than I had intended. I just chose never to leave negative feedback.and I know that I was a difficult client but instead of waiting any more, I chose to learn and grow from all of that pain and I thank some of the dedicated readers who helped me through that time.
Joan