Wow! That's taking some feats out of context! Let's look at Superman's feat against soulfire Darkseid:





So Superman flew through a Darkseid who was distracted with assimilating his newly derived power and then this Darkseid one-shots Superman while noting he could kill Superman with the slightest thought. That's not a particularly inspiring feat compared to Thor driving off Galactus.

Then Superman flies through Emperor Joker. Why is this a special feat? We're not given any information as to how durable this Joker's skin is, and Superman's attack has no notable effect on Joker except to allow him to crack a joke. And what happens next? Oh.