Those who think they aren't being manipulated or are manipulable are exactly those most prone to be manipulated. You can't work on deprogramming yourself until you realize how susceptible to it you are. The people behind these industries aren't using some undeveloped technique, they're drawing on a great deal of experimental knowledge about the human psyche. "MK-Ultra" is a part of it, but not all, they draw on Freud and the psychoanalysts, behaviourists, all kinds of experiments and insights.
To wake up you have to recognise you're asleep, and to develop your own mind you have to realise that many of your thoughts aren't really your own.