Comparing modern surveillance with whatever was going on in the early 1960s is not compelling. To summarize: there is no basis to conclude that the CIA MUST have photographed Oswald. Even if they did, the CIA had incentives not to reveal their methods and extent of surveillance to the Russians and Cubans.
There's not an innocent explanation for why the CIA would have kept secrets from the President and the Warren Commission.
Keeping secrets from the public is understandable. Keeping secrets from the President is not a
reasonable explanation.
Multiple individuals including members of the Russian and Cuban embassy confirm Oswald's presence.
They confirm meeting someone who claimed to be Oswald. Their descriptions of Oswald don't all match his physical appearance. Some of their claims are inconsistent.
The Warren Commission never interviewed Sylvia Duran. Why is that given that she was allegedly seen several times with Oswald in Mexico City?
There was no effort on behalf of anyone after the assassination to promote this narrative. If the entire plan dating back months or years and entailing great risk in assassinating the president was to implicate Russia/Cuba in the war, the conspirators would surely have made some effort to promote that effort after the assassination. But no one did.
False. There were attempts by CIA-connected individuals to implicate Castro in in JFK's assassination immediately after 11/22/63. The DRE, the CIA-backed anti-Castro group that Oswald interacted with in New Orleans, published articles implicating Castro in the days following the assassination.
The efforts by former CIA agents and others to link Castro to the Kennedy assassination continue today.
Also see the Felix Rodriguez interview that I shared earlier for example. Like him, dozens of retired CIA officers have pushed the "Castro did it" theory since the 1960s.
It's not clear to me whether they really believe the theories implicating Castro, or if they're attempting to deflect attention away from the CIA.