For most of us, we have more choice than we often consciously acknowledge. We can choose to fail, as protection against the anxiety associated with striving for success. Or we can choose to succeed, learn to be courageous and act accordingly. Respectively, we can choose to avoid the discomfort of anxiety, or we can choose to absorb and manage our anxiety on our pathway to success.
Being successful does not mean a life free of pain or with disproportionate amounts of pleasurable experiences. Rather it is about the habits we form, to be courageous (when it is safe to do so), to focus our attention on coordinating the various skills required for task completion and to persist in our efforts (for at least as long as success remains attainable) consistently.
If you want to improve your mental health, regardless of your trauma, loss, disadvantage or vulnerability, it is what we do next that matters. Act positively, mindfully, diligently, and kindly and the success will come. Soon enough, failure will become a redundant concept only.