When you have a disability, especially one that's not usually noticed by others, you have to work twice as hard as the others just to keep up. I grew up believing I could never "be enough" unless I could be "successful" and "productive.
In my 30s I had the "gift" of a major depression. Five years later, with the help of counseling and inner healing, I came out of that darkness with a radical perspective shift. I don't have to "do" a lot to prove my worth. I certainly don't have to do it all perfectly. I can be average. I don't have to accomplish anything to be worth something. My worth is centered in God who loved me enough to create me.
What I want to achieve badly enough, I'll work at consistently. I don't have power over every aspect of success. That's OK. If I succeed in my own eyes, that's good enough. The culture's standards of success don't have to be mine. They aren't mine.