You'd think he'd actually be some help in the final fight of FGS instead of a useless NPC that does next to no damage.
Actually, I remember beating him up really easily, years ago. Long before I ever fought Zeus (and definitely before Zeus amped up with power from the Source Wall). So if Darksied was definitely weaker than us, and then we got stronger, then him being a worthless punk in the corner seems about right. By comic book standards, our PCs these days seem to be more powerful than Superman, given that we regularly defeat threats that can defeat him.
Tell that Shazam in Shattered Gotham and try to finish as he turns his back on you ...but youre 99,999% right.