There is a vast difference between failure and temporary defeat.
You can always become the person you would have liked to be.
Nobody rises above mediocrity unless they use the brains of other people.
Until you have learned to be tolerant with those who do not always agree with you, you will be neither successful nor happy.
Find out what you really love to do, and then find a way to make a good living doing it.
If it isn't your job to do it, perhaps it is your opportunity