Your narration about the rude manager is a common sight in many places, and in the last four decades, I have seen plenty of them. I am glad to know from the excellent feedback provided by Mr. Ashwin Nair that you have started viewing things differently.
In addition, you may consider the following to make things easier for you.
The Blake's Model and Its Application
The concern for production (in this case, the SALES) and the concern for people is clearly brought out by Blake's Model. The principle to understand here is that production (sales) and people are compared in a classical four-quadrant theory, with both attributes having a low and high and plotted on an X and Y scale. As a student of HR, please revisit this theory to understand the current perspective from the employee and organization point of view.
I am neither a psychologist nor an HR professional, but reading your first email gives the impression that you wrote it when you were very troubled with your emotions. Please put your thoughts in a Word document as they come to your mind. After a while, when you are calm (the gravity of the issue still remains), you will be in a better position to view and understand it. The spelling mistakes will appear before you, waiting to be corrected, and the idea itself would get presented in a better way as you revise a draft. Here again, we can fall back on Stephen Covey's time-tested approach of the 80-20 rule (some refer to it as the 90-10 rule). It is all about how we react or calmly act on what happens to us. It would be worthwhile to glance through these pages again to understand and appreciate the theory we learned. Please remember that theory and practice always coexist and reinforce each other, be it pure science or behavioral science.
I personally feel that HR professionals need to intently watch their internal customers and try to understand them first (Mr. Covey again!!) and then express themselves clearly as far as possible in simple language.
You have not clearly mentioned how this manager deals with you (or should I say that I have not clearly understood it). My question is, on a one-to-one basis, how does she behave with you? Is it the same way or different? In most cases, the behavior of a person tends to be markedly different when they deal with a person in another department. If this is your case, then it is simpler as you start on a platform of stability. If not, it is an acid test of your HR skills, where the theories you have studied would stand in good stead. Please analyze and work in this direction, taking the challenge as an opportunity.
Please remember, often it is the successful handling of such cases that becomes your achievement, and I am sure one day you will write a success story in the same columns of Cite HR.
Wish you good luck.
Regards,
V. Raghunathan, Navi Mumbai