Engineering vs. Sales
Yes, this is something that you have to get used to as an engineer.
I have been fortunate enough to work for engineering managers that did a good job of making sure engineering's contributions to the company's success was recognized and acknowledged. This goes beyond the occasional pat on the back. It also extends to justifying the money that a given company spends on engineering. We're an easy target in that sense, what with expensive toys and above-average paychecks.
Over the years, my attitude has evolved to that of a professional for the sake of the profession. I strive to excel because that has its own rewards. Therefore, I value the respect of my peers far more than the praise of my boss's boss, who may or may not have a clue as to my actual value.
I'm sure many of us have been in your shoes.