This poor schmuck is stuck in that same alternate TV dimension in which you can find 'Lancelot Link', and 'The Chimp Channel'.
It could be that the future timeline of this TV dimension is where the two astronauts from Earth Prime-Time landed and were befriended by the chimp Galen (as seen in the TV adaptation of 'The Planet Of The Apes'). If so, then their belief that the current state of that world had been the result of human Armageddon was a lie. (They were already under the delusion that they were in the future of their own world.)
It would appear that the blame for the devastated landscape of that future ape-world rested on the great apes. And probably the chimps were solely responsible......
Hey! Is Mata Hairy flipping me off?