US used the atomic bomb and torture. Even without that I would classify the USA in the « evil » category seeing how the social laws works (healthcare, holidays, school, guns,…).
Still they are there and not close to disappear.
I think evil is not self defeating. Evil fails when Good unit and fight. It is and always was a struggle. Good as to fight to win over Evil.
Climate change is a systemic issue: Capitalism is based on always more production. It can’t be solved by individual actions but only by a radical system change. I put some energy in actions that can help - I hope - for this change.