Here's a reading list for you:
Secret Warriors: Inside the Covert Military Operations of the Reagan Era, by Steven Emerson
Shadow Warrior, by Felix Rodriguez
Wedge: The Secret War Between the FBI and CIA, by Mark Riebling
The CIA and the Cult of Intelligence, by Victor Marchetti and John D. Marks
Presidents' Secret Wars: CIA and Pentagon Covert Operations from World War II Through the Persian Gulf, by John Prados
And of course, my particular favorite:
Inside the Company: CIA Diary, by Philip Agee
As for the laughable idea that the CIA outsources it's paramilitary work, that's easily dismissed with a review of the sizes and budgets of the various directorates. And it's not going in the right direction, either.
All no doubt written by people who have their biases and/or want to sell their own books. 99%+ of what the CIA does is boring as hell and won't sell book one. Any big organization is going to have corruption , shady deals, and screw-ups because all organizations are run by human beings are thus effected by human nature. Is the CIA guilty of this? Hell, yes but so is any other large organization. Large corporations, labor unions, all government agencies at all levels that are anything more than pork barrel projects with tiny staffs and even the tiny ones have screw-ups, universities, NGOs etc. all have these problems . You can't build any organization without corruption and screw-ups because of human nature.