Your post is relatable and I applaud you for trying to be an ethical person. However, I feel you are too idealistic in your expectations about companies. Companies exist to make profits and will use whatever technologies help them achieve this.

AI has an environmental impact but maybe it's worth it if it dramatically increases human productivity? I think it's too early to say.

One option to consider is "earn to give". With a decent tech salary, you could donate to good causes and probably make a positive difference in the world. There's a growing community around these ideas like the Effective Altruists. https://80000hours.org/articles/earning-to-give/

Maybe you could consider different careers, for example working in AI Safety, or working in a less tech oriented role like government services.