Curiously, as a teenager, I was on the side of Creon and Antigone annoyed me. What had she needed to plunge his country into fratricidal wars which she had just to get out? A value of peace and appeasement - and order - tidying me to pragmatic power holders. And then ... it is pasionaria, antique anarchist, unable to bend or design any concessions, it is what counterpoint to power, one that requires purity and - very important! - Pays the consequences! Perhaps she simply self-destructive, nihilistic teenager - or cursed by the gods for his parents, but it opens the way to what say no. And God knows it takes!
PS: I have the same issue with Hamlet; why their uncle becomes king? I would have liked that it gave Antigone queen ... But that's another story.