Always remember that you almost certainly have average writing talent at best.
And that there is nothing wrong with that. So do the vast majority of other writers. The fact that most people fall into a given category is what makes it an average. Plenty of average, and even a few downright bad writers have had long, successful, and personally satisfying careers in writing. Likewise plenty of superstar talents get discouraged and quit before ever getting the chance to make a try at a career in writing. In writing, like with most things in life, hard work, determination, and luck play a much larger role than talent when it comes to success. Don’t ever forget that personal satisfaction, joy, and happiness in writing all come completely from within, and are freely available for any writer, even those who have no professional success to speak of.