CIA Oversight

As I understand it, there is a House oversight committee responsible for monitoring the function of the CIA, there is a Senate oversight committee for monitoring the function of the CIA making two committees from Comgress with these responsibilitites. There is one executive branch committee with similar oversight. The CIA works cooperatively with all three comittees. The leadership and structure of the CIA was inherited by the current administration after apparently functioning satisfactorily by the three branches of government with oversight responsibiliteis during the previous administration. Can anyone tell me why, after the Senate Committe investigation identifying problems reaffirmed the information given to us in his State of The Union and other addresses were correct, the failure of the CIA is the sole responsibility of President Bush?