I'm irrationally irritated in so many ways but mainly with DH and the DCs.
They leave every pair of trousers inside out with pantaloons attached as they take them off. It's savagery the like of which I've not seen before.
They eat with their mouths open sometimes. That makes me stabby.
The littlest one refuses to sleep. Ever. He is pecked from the arse of Satan and believes that sleep is for meek and mild folk. He's 6 now and does sleep, sometimes, but I'm still so, so exhausted from his baby years. I won't have caught up on my sleep til he's about 45.
The big one is hitting puberty and is weepy. Weepy pre-teens make me irrationally mad because there is just no pleasing them. You cannot rationalise with them.
DH questions everything and second-guesses me sometimes. It makes me want to get a bulldozer and run it over his fingers. "Are you sure you want that, really though, is it the right thing".
As for large families, I don't have time to give a shit about those; I'm too busy being pissed-off at my own small family. I came from a large family and had the world's shittiest upbringing. I know a woman who has 10 children who are the happiest, healthiest, most adorable family on earth. It's not the quantity it's the quality.