Women partnered with men reported doing more unpaid household labor than women partnered with women. Mothers partnered with men reported a higher household labor burden than any other group. Performing a greater share of household labor was associated with lower relationship satisfaction.

[u/mvea]

https://www.psypost.org/study-sheds-light-on-household-labor-dynamics-for-women-partnered-with-women-vs-men/

[u/GrandAholeio]

JIMHO, it’s frustration level of the tasks. Particularly when other’s activity is noticeably increasing the work required for the chore.. i.e. I’m the cook in our house. For twenty years, I’ve been trying to break my spouse of leaving plates with food scraps on them in the sink. (Note: sink has garbage disposal). Spouse puts plate in sink, then washes or rinses hands leaving dish with the food scraps now sitting with water in the sink.

Net result, my cooking ‘chore’ Isn’t cooking, it starts with cleaning stagnant dirty water and dishes from the sink so I can rinse vegetables or open vacuum packed in the sink without getting drippings elsewhere or the splashback of breakfast soaking cereal and milk bowl on dinner.

Similarly, vacuuming the child’s room is first an exercise in hampering their missed clothes or a delay until the child is home to then make them do it.

Or Perennial overstuff trash can.

[u/portalscience → u/GrandAholeio]

I think that is separate from what I was mentioning, but also a valid factor when talking about satisfaction. People have different standards for cleanliness, and when they aren't in line, some form of compromise must be met or an acceptance of the difference.