I find the ending to be a downer, they just caved. Went along. They should have either left the country or just killed Ron and Ginny and made it very public what had been done and that further attempts to control them would result in them utterly destroying magical Britain.
Author's response
I understand your point of view, but the point of the story (for my writing it, that is) was to figure out some way to understand how that awful 'canon' epilogue came about