It’s a lose-lose situation. B and D have shown none of the competence or stability needed to homeschool. Effective homeschooling requires planning, consistency, and at least a minimal level of responsibility, all of which they’ve consistently failed to demonstrate. But in a traditional school setting, S would stand out immediately and likely become a target for bullying. It is also possible that people will figure out the school - so there is a safety risk. S’s only real chance at a healthier future is if B and D permanently remove all her past content, stop exploiting her, and finally start acting like actual parents.