it’s honestly unrealistic to expect Shanks to face zero difficulty facing a 3 billion berry pirate.
If your idea of Shanks looking good is him neg diffing, yeah you’re in for a disappointment. Oda already made Law look good against Teach.
Oda respects Shanks more, so he probably won’t have him get clowned outright. But Kid can still probably damage him if he does something underhanded, or if Shanks just gives Kid a freebie to test his strength.