Batman is still only working at peak human ability and relies a lot on tech and plot armor to match the other members of the Justice League. Put Bruce Wayne naked in a cell with Clark Kent and have them fight and Bruce is getting rekked. No matter how much training he does, he's not beating Superman in an arm wrestling contest or the Flash in a race. Give Bats power armor and the Batmobile and the can be competitive, but not on his own.
What I keep getting the feeling
@EzekielRaiden wants is that Batman should at some point be able to train enough to beat Supes without kryptonite. And that's not happening unless Bats gets his own metahuman powers OR Supes is powered down to his 1930's power level again (with Bats keeping his 2020's abilities). Or that with enough training, Bats grows into Supes, but without the alien origin. And that is a hefty amount of change beyond "buff martials".