It takes the gonzo nature of the DCU that we've already seen and dials it up to 10.
Seriously, they're depicting the supes as Golden Age supers++. Aquaman falls through a building unharmed and survives full strength Superman hitting him square FFS. He's on nearly the same power level as Thor in the MCU. Cyborg is expressly stated to be able to control the worlds economy, end poverty and literally launch every single Nuke in existence with a thought.
How Batman is actually surviving anything going on around him is beyond me. Like in the earlier films, he spends most of his time avoiding getting hit (which he seems to do better than the Flash who can now move faster than light speed, and Wonder Woman who can move fast enough to watch a bullet fly past her, and deflect a full auto burst, and fly), while taking out the odd mook.
They conveniently left him out of the final fight with Steppenwolf; he had his hands full dealing with mooks (again).
He uses no stealth, just charging in everywhere. He displays no foresight (Lois just happens to turn up at the Kryptonian ship by coincidence) or detective skills, and his technological advantage is rendered moot by Cyborg (who can just remote control everything).
With the insane power level of the heroes, and Batmans ridiculous plot armor, I shudder to think what Darkseid is going to be able to do, and how even more useless Batman is going to look in comparison.
I really wish they'd gone for early Silver age power levels instead of Dragon Ball Z levels of gonzo OTT madness.