Acceptance of critique requires confidence. Those who least accept critique are those who are most insecure and uncertain of the validity of their positions, so they defend them against opposing ideas and even constructive suggestions. Confident people accept and evaluate critique from respected sources, and decide if change is necessary.
Mindset: I can improve my self-worth by opening myself up to critique, not with the intent of accepting all of it, but with the hope of evaluating all of it to choose potential improvement.