Furina did not ruin it. The previous archon did that, and Focalors and Furina, on the contrary, worked hard to save the country.
Egeria literally did nothing wrong, the prophecy was all on Celestia being hypocritical dicks. Meanwhile, the only thing Furina knew about Archon-ing was acting like one because she was born to be a puppet, Neuvilette and the Palais were the ones actually running the country, and the one time she got involved in law personally, she was fingering an innocent for murder.
