I feel the need to lobby for my response. "Asshat General," while amusing, does not define the individual appropriately in a way that would allow someone new to Mr. Asshat's escapades to understand who he is and why you hate him.

"Tech Dweeb" is far more descriptive. It identifies him as a) a technician and b)one who is not very good and therefore worthy of ridicule.

And it is more fun to say than "Techy-Twit."

Q.E.D.