The poor performance of the employee was hardly the fault of the airport.
Why do you consider the employee to be a poor performer. If he/she is late to the gate and on their own, then that is more the fault of the employer who in this case would be the handling agent not allocating sufficient resources. If, as you said he/she was unable to log onto system that this IS an Airport problem as it's their responsibility to ensure all systems are working correctly. Manual boarding will always take longer than using an automated system.