Remember that frustration is a sign somewhere, you took it too seriously.

Disappointment s cousin is Frustration, the second storm. Have you ever been frustrated? It happens when things are stuck. This is pertinent in the life of every youth. From traffic jams to getting that job you deserve, sometimes things take so long that you don’t know if you chose the right goal. After books, you decided to set the goal of writing for firms and the media houses, as you may thought that they needed writers.
You are extremely lucky, but it took five years to get close to a release. Frustration saps excitement, and turns your initial energy into something negative, making you a bitter person.
How did I deal with it? A realistic assessment of the time involved movies take a long time to make even though they are watched quickly, seeking a certain enjoyment in the process rather than the end result at least you are learning how to write good scripts, having a side plan.
You have your third book to write and even something as simple as pleasurable distractions in your life.
Your friends, food, travel can help you overcome it. Remember, nothing is to be taken seriously. Frustration is a sign somewhere, you took it too seriously.