Which acclaim director had the biggest downhill?

I think it's probably Francis Ford Coppola the most logical answer here. His 1970s is consider one of greatest directors runs in history with films like The Godfather, The conversation, Godfather 2 and Apocalypse now. His 1980s and 1990s were decent as well but after that most of his films received mix or bad reviews like fot example Megalopolis 2024. Are there any other directors who have dropped the quality of their films like him?