Water affairs, organization, meteorology, earthquake and other departments are basically not busy and rarely work overtime; However, some departments, such as the Party Office, taxation and government, are very busy. Overtime is daily, and they are on duty. They even need to go out for formalities and affairs. Moreover, according to the different functions of each person, even two people in the same office have different degrees of leisure, so it is very likely that your husband is the latter case.
In this case, my suggestion is: be more concerned and understand each other. Tired work will really crush a person, plus he has just been demoted, and his mood is also very boring. What he needs most now is your encouragement and help. Pay more attention to him at ordinary times, serve tea and pour water, take the initiative to do housework, especially when he is unhappy, and try to avoid quarreling. It is not easy for two people to be together. In addition to romantic sweetness, feelings need daily maintenance and tolerance. After these days, it will be a lifetime.
I wish you happiness.