I can relate to this.

Killing the idea that anything is ever finished. When you realize everything is in flow and unfinished all of the time (it just depends on how much you want to zoom in or out). That days are short and unexpected things happen, and that you're doing what you humanely can to improve. Humility and acceptance will let you go to bed in peace and rest.

A hack, because we all still judge our productivity, is trying to focus more on what has been achieved in a week or month, instead of a day.