You are not convincing them that you will be a good hire. Your article talks about what you want and how you feel. Consider what those companies want and how

You are not convincing them that you will be a good hire. Your article talks about what you want and how you feel. Consider what those companies want and how they feel and try to determine why they failed to pick you over another candidate. Talk to people you trust and ask for honest feedback on your weaknesses. Compare those to the things you learned during the interview. Improve your skill, your communication style, and your contacts. Continue to drive for the role you want, you will get it when you shape yourself into someone that can genuinely convince people you have the right stuff.