Personal question- have you ever been in a relationship with someone who has anger issues? I absolutely adore my partner but he gets really upset a lot… and I just cannot understand or relate. I try to be empathetic, but really I don’t understand. Curious if you have been in a similar situation.
"Grumpiness" in adult males can also be an expression of depression and/or low testosterone, especially in those over 35. However, to add to what
@lunarious suggested, although men and women have a lot of crossovers in terms of their personality traits, it's at the extremes of the bell curves where we see that the most aggressive and disagreeable people are males and the most passive, altruistic, and agreeable people are females. Part of that is natural selection that goes back millennia, part of that being testosterone/estrogen balance, part of that being the social construct that expression of male emotions is considered a weakness and/or our feelings don't matter. Males are often taught from early childhood that we do things out of a sense of duty, honor, and discipline and if we are not taught that, those men who act from a source of emotion are very dangerous or undesirable individuals (rapists, murderers, domestic abusers, thieves, adulterers, lazy, etc. the men who put the "toxic" in masculinity.) On the other hand, men who have been taught the virtues of responsibility, duty, honor, and discipline will often be the ones who will support their wife and family even in the presence of unhappiness, whereas, statistically, women will leave their husbands if they are unhappy. Many men spend an entire life of pushing down emotion and working on our self-control and discipline yet still feeling emotions deep inside. There can be steep consequences for men who act upon their emotions.
Furthermore, and this is a very common phenomenon, that as much as our female partners desire to know what we are feeling, when it comes out that what we feel is pent up anger and frustration (almost always), that our female partners become quite defensive, angry, scared, and/or generally upset to the point of tears. Of course, our response at this point is to be put into a position where we have to console and apologize, and our emotions are never validated, but often rejected, and we are then accused of being horrible people. So, the people who we love the most become the very last people we would ever consider being vulnerable and showing our emotions to. The loving women in our lives are often the hardest on us.
In the business world, the same thing. Emotional neutrality and control are desirable leadership characteristics. If someone "loses it" emotionally, there will be an immediate loss of respect, if not even disciplinary action or termination.