Antonyms for "having confidence of" would include words such as "doubtful," "uncertain," "insecure," "disbelieving," and "skeptical." These words suggest a lack of faith in oneself or in others, and can often result in negative outcomes. When one lacks confidence, they are likely to second-guess their decisions, be hesitant in taking action, and ultimately fall short of their goals. It is important to recognize and address these feelings in order to build a more positive and successful mindset. By practicing positive self-talk, setting achievable goals, and seeking support from others when needed, one can regain their confidence and achieve their desired outcomes.