Thank God for the people who told you no. Some of them were protecting you.

Some closed doors were mercy you could not read at the time. A no you did not want kept you out of a room that would have cost you something, and you often only learn that much later. That does not make every rejection a gift, or take the sting out of the ones that were just unfair.

Think of one no you are still annoyed about and hold it loosely for a week. Ask God what it spared you, and be willing to get no answer yet. Gratitude is possible before understanding, and it tends to arrive first.