system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] How could the Joker overpower Batman?

Batman, having trained and learned many martial arts, and pushed himself to near human perfection, was overpowered by a lunatic who has only unpredictability as a serious fighting advantage.
gpt
Not just unpredictability, but his mind is as strong laterally as Batman's is deductively. The Joker would find ways to strike through every system of reality that depends on some form of logic. Language, art, sociology, economics can all be perverted and weaponized against Batman since his strength is in having such deep connections into any system relating to Gotham's infrastructure. 

"But what does this have to do with combat?" Everything. When they fight, they aren't fighting like boxers with punches for the sake of breaking their opponent physically. They fight like chessmasters with any overpowering of Batman, to a layman, looking like he was put into check. The thing is that they are playing a game of chess by moving each piece in inhuman ways, representing every citizen of Gotham, with rules that they create and neither could ever win. 

 **-----Edit** For comparison, this is how someone as intelligent and strong as Bane can only assume breaking Batman's back would break *him* as if he was merely someone pushed near human perfection. Bane's mind is savage, but austerely rational. Reality to him is as much of a prison as the one he was raised in.  For the Joker, reality is just another Arkham he can break through by sneezing. 

His opponent is Batman-the-Symbol. It would be a joke to think you can benchpress/venom/artificially scare/freeze/riddle your way into Gotham's embrace.