We really only saw like 25 minutes of the Joker, after he said fukk it and embraced the fukkery.Even if you factor that out, Joaquin's joker doesn't strike me as a criminal mastermind that can go toe to toe with batman
No telling what he could do if he's off his meds for a long time and got people backing him up.
Killing Joke Joker went from a engineer to a failed comic to
At the end of the movie he kills a nurse for no reason at all and runs around the hallway like he's getting chased playing tag.