Actually, the leaks probably came from outside the agency, the report by the former British MI-6 agent was widely circulated.
The Russian hacks were verified by independent security agencies before the CIA investigation.
Contacts with Trump people were picked up by routine monitoring of Russian communications.
Manafort is a sleaze, he was working with the corrupt Ukranian dictator who was a Putin ally who stole the country blind. He was paid millions by them.
Flynn made multiple calls to the Russian ambassador when sanctions were announced.
The fake news sites are both Russian and third party sites that do it to drive hits to sell advertising.
And no one has suggested that there is definite proof that the Trump campaign conspired with the Russians, what is more likely is they were "played" by the Russians.
The Trump people combine greed and stupidity, which makes them easy marks.
Truth is, if Trump wasn't such a fool, the intelligence agencies would prefer him, lenient oversight and bigger budgets to fight real and imagined enemies.
Putin is former KGB, which is not much different than being former SS.
While the CIA certainly doesn't have clean hands, there's a false moral equivalency, KGB are like Cortez the Killer: "plenty bad man."
There is no oversight or review of KGB or its successor agencies, secret police agency FSB (Federal Security Service of the Russian Federation) and the espionage agency SVR (Foreign Intelligence Service). They do what Putin tells them to do, from fake news to blackmail to murder. Trump may yell at people, Putin makes them disappear. Notice that there is nothing on Wikileaks about the Russian government or intelligence services, don't hold your breath waiting for it to appear.
Yes, we use drones and Special Forces to kill people, but we're killing people who should be killed, ISIS and Al Queda are murderous thugs, partially driven by religion, but also by the opportunity to use religion as an excuse to rape, murder and steal. They are not "third world liberation movements," they are religious fanatics who use terror indiscriminately to push their agenda. Putin first kills thousands of people in Chechyna, then cuts a deal with the Muslim strongman for his militia to serve as his "brown shirts." The seizure of the Crimea, the hidden invasion of the Ukraine (little green men), the indiscriminate and deliberate bombing of civilians (to sow terror) in Syria. He is a cynical, evil man, who pictures himself as an heir to the Czars, and uses the Russian Orthodox church to legitimize his corrupt regime (see the Panama papers detailing money transfers from Russia).
The idea that we can work with Putin is ridiculous - he has no interest in crushing ISIS, it provides him with an excuse to build up his presence in Syria and right now presents no threat to Russia. Putin will play off us against the Turks, the Turks against the Syrians and Iranians, support populist parties in Europe to break up NATO, and so on. Since he can't strengthen Russia (because it's dependent on oil and has no other source of sustainable economic growth and a declining population), he wants to weaken Europe and the US. The CIA did not invent Putin, he's a real menace.
As far as Iraq, that wasn't the CIA, that was the Bush Administration, they concealed and manipulated the information provided them by the intelligence agencies to sell their agenda. That's the real fear with "alternative facts," that the Trump Administration will try to pressure the intelligence agencies to control information to Congress and the public.