https://www.bbc.co.uk/sport/football/articles/c4g6z3prwzzo
This is an interesting item comparing EPL with the other major European leagues in regard to all teams promoted to the top tier getting relegated in their first season.
Interestingly, it's only happened since the creation of the EPL, never happened in the old Division One, and during that same time, it's never happened in Italy, Germany, Spain or France.
Is something broken?