How Did I Become the Strongest Beast Master from a Forest Ranger?

This is a world after spiritual energy is revived. The protagonist is a man who just wants to escape from the oppressive living environment. I directly applied for a job as a forest ranger, thinking that I would simply work until retirement, receive some pension, and live a simple life. However, he unknowingly became an unparalleled master in the eyes of others, and became the idol of all beast masters.