Whats the one company you won't invest in based solely on your principles or experiences even though you know it'd be profitable?

I worked for GE Energy for 8 years. In those 8 years, I was "reorganized" into 5 different subsidiaries of GE. The corporate management of the company was so dishonest, unethical, and inept. They lied to us consistently and eventually laid off all my coworkers. (I bailed out early).

I still deal with GE Vernova now as a customer, and they are absolutely the worst organization I've ever dealt with.

I know GE Vernova will be a strongly performing stock. It's hard to fail when you consistently cheat your customers. I can't ever bring myself to buy in as a shareholder.

Do you have anything similar? Strong moral dilemmas? Bad experiences, etc?