Well he did try to invade Cuba

He also put nuclear missles in turkey which were then used as part of the negotiation to get USSR to dismantle their Cuban bases so we wouldn't invade.

Other way around. He put missiles in Turkey and Italy, USSR responded by putting missiles in Cuba, then both parties agreed to deescalate and withdraw. Then of course a few years later none of this matters because ICBMs become a thing and the soviets and americans can just launch over the north pole.

(for the record, I did not mean to imply the temporal ordering you suggest I did)

And he was critical of the CIA and FBI.