Zoe needs to find other high-performing activists like her, whether by convincing them to join her group, or by joining theirs. Everyone will be happier as a result.

Alternative: Zoe seeks out an understudy as someone to soak up the organizing knowledge from her. It won't help her depleting energy but will help her mental health, and the understudy will learn tons.

Zoe doesn't need these do-nothings who resent her heavy work without recognizing it. Her activism will be amplified and her mental health bettered if she works with other effective people.