2. Opportunities to grow and develop
Your ex-boss is one of the people who helped you to grow and develop. And this includes a few spheres of your life. You have become socially successful thanks to that person. Also, you have grown professionally and now can do your job much better. Your growth is not limited to that though. In your previous workplace you grew personally too. Be thankful for all of these opportunities. Appreciate your ex-boss for letting you become someone different and better.