(My first post. Have mercy ._. ) A lot of people who suffer from the I'm Batman syndrome A.K.A saying that he can do anything and everything without providing actual feats, often bring Hellbat into the argument and say that Hellbat has beaten the crap out of Darkseid and that Darkseid barely survived Hellbat and that Hellbat has even killed Darkseid. However, that is not the case. Hellbat and Darkseid fought in Batman and Robin: Issue 37 (New 52).
On Page 5, Hellbat delivers his first punch to Darkseid
On Page 6, we see Darkseid thrashing Hellbat as opposed to a punch.
On Page 8, we see Darkseid thrashing Batman again...
On Page 9, we see Darkseid crushing Hellbat with his foot and tearing his wings off
On Page 11, we see Hellbat delivering his second and third (final) punch
On Page 12, we see Darkseid delivering a punch to Hellbat
On Page 13, Darkseid fires the Omega Beams at Hellbat and Hellbat uses the Chaos Shard to attract the Omega Beams like a magnet. He used the power to charge his suit up to 100% and here on Page 14, he fires a blast which knocks Darkseid on his feet and Darkseid does not look damaged or as if he were about to lose the fight.
On Page 15, the Hellbat suit gives Batman a hazard warning. The suit integrity has been compromised and the core is being magnified.
At this point, as you can see, Darkseid literally doesn't give a shit and lets Hellbat escape. 3 punches and one blast as opposed to 1 punch, wings teared off, and the thrashing that Darkseid gave him, let alone the fact that he let him escape at the end even though he could grab him and finish him off. Thanks for reading. Cheers :)