It is all in how you frame your success.
"Simply being is never enough, their right to exist can only be assured by constant doing." - The School of Life
This quote sums up the mentality of high achievers with a poor framework for success well. The motivation to do more comes from a place of self-doubt, fear of acceptance, and self-loathing for harboring those feelings. It is not a rational or particularly happy framework on which to base actions.
3 Achievement-Centered Reframes
Daily Self-Reflection: Journaling, or voice dictation of your thoughts provides personal insight and changes perspective. Be clear on what questions you are asking yourself and how you are answering. Focus on what you can control rather than what you can't and make plans to improve.
Focus On Your Efforts: How much work you put in trying to achieve an outcome does count for something - even if, especially if, the outcome is not realized. Celebrate your wins and incremental progress. Avoid unrealistic self-expectations tied to perfectionistic ideals.
Ask For Feedback: When you identify your personal value as being tied to your accomplishments there is a tendency to have negative self-talk. Asking for feedback from those you trust (like mentors, coworkers, friends, etc.) helps you to see yourself from another perspective. Often this outside perspective does more to highlight your strengths than hours of self-reflection can.