Under every roof
One day about 15 years ago, an old lady in my neighborhood told me stories about my great-uncle, who had been a farmer, hunter, heavy drinker, and wife beater.
Then, with a wise look in her eye she said: "Unter jedem Dach wohnt ein Ach." This is not easily translatable, but it means "Under every roof lives a tale of woe."
This phrase has stuck with me ever since.
No household is perfect.
Everyone struggles with something.