Only problem is that Hashem isn’t limited – He can create a satisfying and just system of He wanted.
Not if “just” doesn’t fit with your definition of “satisfying”…
You know the famous question if Hashem can create a stone so heavy that He can’t lift it? How would you answer it?
I would answer that He can’t, but that isn’t a contradiction to the idea that He is “kol yochol” (unlimited), because the fact the He “can’t” do something which is inherently self contradictory isn’t a limitation in Him, it’s the nature of the paradox you are asking about.
Similarly, if your definition of “satisfying” doesn’t fit in with His (perfect) concept of justice, that’s not a limitation in Him ch”v, it’s a flaw in you.