The secret secondary goal of NaNo is to learn how you write under pressure.
What's depleting you isn't the act of writing; it's the shame you feel about how and what you're writing.
Think about how you can invite yourself to write and make writing feel like the thing you most want to be doing right now.
We often have to confront the undeniable fact that writing takes time away from other things that we, or other people, think we should be doing.
The person you injured is you, in the sense of costing yourself the time and effort of repairing the problems with your work, and the person you need to apologize to is you.