When you make a mistake or get ridiculed or rejected, look at mistakes as learning experiences, and ridicule as ignorance. Look at rejection as part of one performance, not as a turn down of the performer.
Success is not a pie with a limited number of pieces. The success of others has very little bearing on your success. You and everyone you know can become successful without anyone suffering setbacks, harm, or downturns.
Close your eyes and visualize the person you really want to be, who fits your own concepts of self-respect. If you can see the person clearly in the mirror of you mind, you surely will become that person.