Teachers are expected to be perfect. With such excessive exertion, teachers burn out quickly. Within a couple of years, they decide to change courses. As a teacher who has seen such sentiments throughout my experiences, I would like to emphasize that you can make mistakes.
Please understand that every student may not like your class. Teachers will not always appreciate your ideas. Administration may add pressure with initiative fatigue. Do the best you can, but embrace that you are imperfect. Focus on the positive moments, and you will prosper.