Yes, that’s what I see, that’s clearly what he’s doing. The difference is that in 2016, he was able to retain in long-term memory what didn’t work, and had the mental flexibility to try out new bits to find things that did. Now, he keeps going back to the same dry well over and over again, in every speech, which is evidence that he’s losing it. (As further evidence, I’d point out that this is consistent with the amount of time it took him to grasp that he wasn’t running against Biden anymore.)
Seriously. Saying “we’re fucking morons” for being surprised by the 2001 attack on the World Trade Center might be hyperbole, except the same group tried the same thing in 1993! They were just bad at it. Instead of being a KIND OF A REALLY BIG HINT, that incident just kind of disappeared down the memory hole.