Great point, Oswald was a deluded fame seeker as evidenced by his debate appearance defending Marxist-Leninism, he was a loose cannon and one of the LAST people anyone could trust to be part of a conspiracy.
I’ve always felt that the reason for all the suppression that opened up so many conspiracy theories had more to do with the “how,” rather than the who. As Oswald had access to the CIA for a time, I wonder if he used a prototype semi-automatic and the bolt action was planted to cover up the Agency’s mistake.