Darkseid was trashing it pretty easily iirc the suit absorbed and redirected a certain type of energy which was the only attack that really seemed to hurt DS.
Hellbat endured Darkseid's attacks pretty well, all things considered. It's attacks were also capable of rocking Darkseid himself to an extent... But DS is a universal+ being, so he's also not a good measuring stick. It toyed with Kalibak easily, though.
...And a n00b in the suit also did quite well against Eradicator -- we even saw that the suit can soak his most powerful attacks. /shrug
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"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
Well, to be fair, Green Lantern also received punches from a "universal +" being and didnt ever get KOed. In this point is hard to know what is PIS/Jobbing or durability feat.
If so, Thor wins eventually. If we discontinue that, it could go either way, but Thor has a pretty good record of dealing with men in fancy metal suits, regardless.
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Besieged by countless foes, his eyes they are aglow, longing for the fight. He stands upon a mound, doesn't aim the throw, just lets the hammer fly!