He makes a case but two things: (1) Weiner obviously has an axe to grind in his polemic, and (2) we hear much more about the CIA's failures than its successes. But definitely during the cold war the russians smoked us in espionage.
What success did the CIA have, ever? List their failures is so easy, I'll start with the ajax revolution and Pinochet, both occasions where if the CIA had done nothing the world would be better and the USA stronger.
* Operation Ivy Bells (joint with USN and NSA, according to Wikipedia)
* Stuxnet, possibly (unclear who was responsible for it, although it's generally thought to be joint US-Israeli effort)
*yes, I'm making a joke. Mostly.