The reality is that BB8 was an awful series.
The series did have its' moments - any series does - but the not-so-great tasks, poor twists, diabolical production, meddling by the producers, wishy-washy housemates and cheap gimmicks (*cough*allfemalehouse*cough*) ruined the series and this was reflected in the viewing figures - it's not surprising that it was the worst rating series ever.
Charley was a god-awful housemate - she may have provided most of the entertainment last year, but when vast majority of that entertainment is continuous arguments it gets a bit boring, repetitive and stale.
(No, I'm not here to join.
)