Embrace Your Emotions: Accept that frustration, doubt, and insecurity are natural responses to failure. Instead of suppressing these feelings, give yourself time and space to acknowledge them.

Analyze failures: Try to understand what went wrong. The analysis will help to highlight the factors that could have influenced the result, and use this experience for the future.

Define your successes: Recall the times when you successfully coped with something difficult. This will help you regain a positive self-image.

Set realistic goals: Set small, achievable goals for yourself and stick to them. Gradually restored confidence will grow with each achievement.

Reach out to positive people: Connecting with supportive friends and loved ones can bring a positive vibe into your life and help you see your qualities.

Practice Positive Thinking: Focus on your strengths, not your failures. Avoid self-criticism and notice your small victories.

Learn new things: Try to learn something new or developing to feel the growth. It can be as much as a new skill, or immersion in an area that interests you.

Use mental techniques: Meditation, positive affirmations, and visualization can help you manage your thoughts and redirect them in a more positive direction.

Avoid Comparison with Others: Do not compare yourself with other people, as everyone has their own path and their own pace of development.

Give yourself permission to make mistakes: Failure is a part of life. Remember that even great people have experienced setbacks along the way.

Remember that restoring your confidence is a journey that takes time and patience. Don't be afraid to reach out to friends, family, or even professionals for support if you find it difficult to manage on your own.