People that think Batman can take on Superman are stupid
If Superman takes the fight SERIOUSLY, isn't a victim of Plot Induced Stupidity, and wants to kill, Batman is dead before he knows it
Superman can fly faster than light meaning before Batman can react, Superman can speed blitz him and literally cut him in half
He could lobotomize him from space or miles away considering he has high control over his laser vision and since it's many times hotter than the sun

only way Batman would even slow down Superman is with years of prep time

at people thinking Clark is stupid.