A321 pilot reported to commend ground controller for professionalism; handling multiple aircraft due to staffing shortages. Pilot suggested that companies provide guidance to crews to be attentive and professional in situations such as this.

Narrative

During taxi operations at ZZZ; the ground controller demonstrated exceptional composure and performance under extreme workload conditions. Due to the government shutdown; staffing shortages left him single-handedly managing all three ZZZ ground control frequencies simultaneously--coordinating approximately 40-50 aircraft at once. Despite constant radio congestion; delayed readbacks; and several pilots missing or stepping on transmissions; the controller maintained calm; concise; and professional communication. His ability to maintain control and situational awareness of all active movements was remarkable.Unfortunately; pilot discipline on frequency was below standard. Some crews displayed impatience and disregard for the controller's heavy workload; including interruptions and at least one heckling transmission. This serves to commend the controller's professionalism and extend an apology on behalf of the pilot community for lapses in courtesy and attentiveness.Cause: The primary contributing factor was ATC understaffing caused by the federal shutdown; leading to extreme workload on a single controller. The secondary factor was pilot inattentiveness and poor frequency discipline during high workload operations.Recommend that air carriers convey formal appreciation to the FAA ZZZ Ground Control team for maintaining safe; efficient operations despite critical staffing challenges. Also recommend company communication to flight crews; reinforcing professional radio discipline and respect for ATC; particularly during high-stress conditions.