When i get irritable, it's usually about not having sufficient control over my environment. I also think that we get irritable when you want someone to behave in a certain way and they can't or won't. It's why i'm so happy to be travelling, thanks to the pandemic. Every minute i am not in the back seat of an ober or on an aerplane in the hotel room, the happier i am - because that makes me irritable. But since we're talking about yours, have you noticed that your irritability has increased or decreased as your children have got bit older?
Also: what’s wrong with being impatient?