While anger is a part of the human emotion spectrum, I doubt it should be the thing driving conversations at work. It sounds like you identified what you don't like and you found a place where you can thrive, and that is something many people won't do, so kudos to that.

Life is what you make of it not what it makes of you. If you don't want anger it doesn't need to be there.

But it isn't. Circumstance molds you. The Great Depression did untold psychological damage to entire generations. I don't think they could just will the anger and resentment and destitution away

Circumstance is what you allow it to be. Short of being put in a Chinese concentration camp ala Uighurs, you generally have the last say in circumstance to experience anger.