To be fair to Darkseid, Superman was amped by the power of the sun in this fight as he was so close to it. The closer Superman is to the sun, the more powerful he gets by the second. Still, it's a win and it's an impressive one. The only win against Darkseid I don't consider P.I.S.
I do agree that for drama's sake, for Darkseid to make sense as a character and a real threat, he should beat Superman. And when evaluating Darkseid's entire history and feats, I think he should also beat Superman, but most of the time, Superman gives him a very tough fight and has either won or stalemated Darkseid.
Funny then, because Darkseid has beaten Superman far more than Superman defeating him or stalemating him.