Almost every prominent author has had something to say about rejection and the extremely low probability of getting published. Agents and editors will tell you your chances are one percent, two percent at the very best.
But it's worth pointing out that at some moment in time each successful author was unpublished and faced the same odds of rejection that you do. Each year some writers do win the prize, and you could be one of them—but only if you take that risk. If someone had told me the statistics before I started writing my first novel, I probably would have immediately stopped. Why bother when the odds against me were so great? Fortunately, I didn't know what they were, and in my naiveté, I believed I could write a novel and get it published.
One percent or two percent is unimportant. If I had paid attention to the statistics and quit before trying, my foolish dream of becoming an author would have been just that—a dream.