It's a funny thing, but the type of arrogance you can get from some service people is unique to that background. It is very unusual, but when it is there, it is awful. You may be a QFI on Hercs and done instruction on Hawks and flown with the Arrows and been an examiner....all very good, but there is a relatively new skill set to adapt to, and operational procedures to learn, none of which bear any similarity or have any hope of development or improvement from a service background. So it is well to enter a new way of life with respect for the peers and experience involved.
My own experience of looking the other way is that some of the worst handlers I have ever seen are former single seat fast jet pilots. Chucking a Harrier around solo does not create the discipline needed for precision instrument flying, or provide any of the skills and judgement needed for successful regular airline ops. Sitting there thinking the guy in the left seat is less qualified than you will lead to a bad flying experience- it will show.