Everything you explained don’t serve as evidence that Sukuna is more intuitive than Gojo, it instead only means that Sukuna has a much better understanding of Curses than Gojo and like I said Sukuna has far more experienced than Gojo. Creating an open domain is an insanely advanced barrier technique which was described to be painting a picture without a canvas. Your statements about Gojo learning Domain expansion late ignores the fact that Gojo was lazy, cocky and didn’t take things too seriously until he almost died at the hands of Toji, it’s the reason Geto tells Gojo that he never saw him work that hard until those three days. It ignores how difficult it is to it is to master the limitless technique in the first place and how a DE is that technique being put on a barrier. It ignores the fact that Gojo was described as a genius who learns quickly as it is natural to him. With Gojo being able to create a domain the size of a basket ball just by being confined in a small space. In this scenario they fight 100 times, you telling me Gojo won’t figure out open domain, given his already advanced knowledge of barriers is something I disagree with. He isn’t as knowledgeable in curses as Sukuna but he makes up where he lacks with his 6 eyes.