Can someone explain what the UK public finds in Cameron - his economic policy has been mixed bag at best, foreign policy is same and internal policy - you have

Can someone explain what the UK public finds in Cameron - his economic policy has been mixed bag at best, foreign policy is same and internal policy - you have the whole Scotland situation - i have a feeling that Downing street unlike the Scots prefer to forget about the whole "devolution max" stuff. 8 years into depression and London situation getting somewhat tense - there should be at least figurative heads rolling, and yet he get reelected and entrusted with more power ...