You want candid and blunt?
Count me among those who believe it is rarely appropriate to deliberately be a jerk.
Especially with customers!
Being irritated because someone doesn't know as much as you do is counterproductive.
Telling people trying to order that they are wasting your time, really? It's your freaking job. What could be more important than helping a customer get an order figured out? In a hurry to get back to playing Minesweeper?
Is making people feel bad good for repeat business?
And just what is so admirable about being stuck in the last century?
But who am I to complain? If someone is happy satisfied with their old school system, undesirous of progress or improvement, and enjoys belittling people for not being able to find a part or its number on their website, thanks to its haphazardness and incompleteness, more power to them, I guess?