I personally think telling the public the program was shut down and didn't have great results could easily be a red herring.
Truth be told - if there was a lot of success from Psyops programs, and you were the US military, would you want a lot of people to know?
The way it went in history is that the US started with it to bait the USSR into spending money into a worthless project (which succeeded). Then, the US replied to that with "what if it is real?" There was still a lot of belief in "the paranormal" back then; nowadays we know much more about the techniques behind paranormal scam artists.
I've seen various documentaries on these programs (including about remote viewing and Ingo Swann [1], a scientologist), and from my memory the results of these programs were lackluster. Sure, there were some hits, as there are hits with cold reading and guessing.
[1] https://en.wikipedia.org/wiki/Stargate_Project#Closure_(1995...