As a multiple time ground force commander both in Iraq and stateside for CI operations, I can firmly state that there is literally zero to be learned about leadership from corporate or political worlds.
When I left the USG because it’s fundamentally corrupt, I went into private business thinking there were technical/business leaders that had pro-social incentives, and their heads screwed on.
Man was I wrong.
The US military has by far the best, all encompassing, most focused and persistently updating leadership development and it’s STILL absolutely garbage.
There’s ZERO, and actually most likely negative, incentives to think about and apply ethics in business and politics, because at the end of the day the most ruthless will win in the long run.
That's quite a strong claim. I disagree. Military leadership, like business leadership, is imperfect. Both vary based on individuals, the operating environment, and culture.
It sounds like you have been burnt, badly.
There is surely a business out there that does fit your world view, though the pay and conditions might not.
In my view, the need for growth at any cost is toxic and leads to all sorts of horrible behaviours.