Yeah, that's the playbook for any nation in any era. Debasement of currency until it's mostly colored iron is normal. A bunch of deviants on the throne is a given. Bonus points for generations of incest. Bread and circus, jousting and all kinds of entertainment were always there as a distraction. And latrines leaked into the groundwater. Your mistake is thinking this time would be different. Every nation has its high point and decay.