As memory serves them Captain, with some justification was dissatisfied with the slow boarding. I did not hear the actual start of this but like all rows, it was only when these two grown men started shouting about how the other one spoke to them that was being yelled. I suspect that the already late flight was thanks to the useless and frankly apathetic ground handling there was to be a further delay. The cause of this was chronic overbooking. Loads of people had been sent to the gate to standby. It was an unholy mess and I resolved never to touch this tinpot outfit again.