It seems to be impossible to explain this. People just don’t get it. They are so used to having nearly infinite reserve capacity and assume everyone else does too. I have none. Every time I run out of energy, it’s laziness, carelessness, or a dozen other moral failings because I can’t possibly be different from them.
Fortunately, I’ve been able to convince people I’m doing my best and they are willing to accept something they don’t understand.