There are some hills not worth die on. There are moments when a retreat is better than a worthless fight, saving people in the process.
I did the same mistake working for a company that went from morally sound to "almost-Enron". I thought it is a fight worth taking. The company went its way, I made no difference in the end, I just stressed myself for years for nothing. Life is too short for that.
If more people at the company had followed your example...would it have turned out differently? Seems like you had the right idea just nobody else cared enough to join you
In a company with 100,000 employees even a few hundred will not make a difference, even if they all work in the same department and make it critical for the company. This is my experience, it may be better in other situations and other companies, but when the bad things come from the very top, there is no solution.
I did the same mistake working for a company that went from morally sound to "almost-Enron". I thought it is a fight worth taking. The company went its way, I made no difference in the end, I just stressed myself for years for nothing. Life is too short for that.