I do not think this can be argued without specifics eg time place flt number etc and even then it is a bit pointless.
In general I do trust the ground staff at BHX to get on with the job in a sensible manner. But then I would say that as an Airbus driver! If I was in your position I might see things differently.
I have encountered some bias in handling elsewhere. It has been common practice regardless of loads to allocate remote or second class stands for regional airbus flights in favour of LHR operations at EDI and DUS. It is a bit annoying but keep politely asking the ground staff why and bang in a voyage report if you are not satisfied with the answer.
It would be good if we could all get along a little better. The common denominator in most of the arguements we have is the BA management and its decision making ability/logic/insanity etc
Regards BP