Why did shinji left the soul society bleach?

Shinji Hirako left the Soul Society due to the oppressive nature of its leadership and the corruption within the system, particularly under the rule of the Gotei 13. As a member of the Visored, he sought to challenge the status quo and promote greater freedom and individuality. Additionally, his departure was influenced by the events surrounding the Hollowfication experiment, which further fueled his desire for change and autonomy.