I'm so old this might not count as modern5-0 down in 20 minutes is a bigger "disaster" than any other performance this season........ Possibly than any Spurs game in modern memory.
It didn't take a genius to see that a switch to a back 4 was a dreadful idea.
1969 Up at Clough's Derby County, with Dave McKay in their team. DC just promoted and we were 5-0 after 20. I think it was televised too.