I feel you. My job is also preventing me from putting my limited energy into things I think are way more important, and I'm not sure about what to do about that.

With burnout, it's helped me to focus on the things that have gotten a lot better without denying the things that are absolutely unacceptable. Straddling past successes and present problems helps me deal with stress, because I know the past successes I live within included lots of the little failures, false starts, and periodic feelings of impotence that I'm experiencing now

Learning about the internal lives of anti-oppressive people from the past also helped me because this feeling of burnout is totally normal in people who were successful in winning liberation, throughout history and across various movements

A new thing I'm trying to do is focus on feelings of care/respect for people who are the most precarious more than I focus on the enormity of harmful systems or hostility for people perpetuating the harmful systems. I find I can maintain more energy when I focus on feeling excitement for how someone's life (and our lives collectively) might improve if I work to end various oppressive influences rather than if I focus on grief/stress about how folks needlessly suffer (though all these feelings are important). Letting all of the feelings exist has been good instead of focusing exclusively on the lack-oriented ones