the way I see it, there is no "competition" about somebody who gets to win because they can't do as much as you. Frustration is about what happens in the context of your life. If you used to be able to teach all day and then have an evening with your family and get up the next day and do the same thing, then not being able to do it without being exhausted is reason enough for frustration. Vent away. That's what we're here for.

that said, what helps you get to the place where the frustration is less - and mostly because frustration takes up a lot of energy you could be using on other things - getting rid of the idea of "should" can be your friend. it is the "should" that makes you look at your life and see only what you don't have. And sure, you absolutely have to process the feelings, move through the grieving of your loss of health. Eventually, though, the only way to stay sane is to find a way to acceptance.

Energy management is a challenge for most of us - the difference between what we can do and what we want to do can be substantial and frustrating and make you want to bang your head against the wall. The Spoon Theory  is a fantastic idea about energy management that puts everything in a much more practical context and can help you skip over the "should" and into learning how to conserve your energy and prioritizing what is important enough to spend it on.

you can learn a lot of coping skills and tricks to work around your limits and your frustrations, but every now and again, it still hits you. And that's why we're here. To tell you you're not alone. I'm very glad you found this site. Welcome to the MyRACentral family!