It's because of >>103913028
The best part of Scott is, arguably, the part Darkseid gave him. Strength, will, the ability to endure anything for a goal: and the goal Scott chose was "freedom", and Darkseid has yet to break him.despite that being the whole goddamn plan.
You gotta think, sometimes, seeing Orion and Mister Miracle as gods of good, Darkseid can't help but wonder if Highfather got the best of him during their little exchange. And that has to drive him fucking crazy.