As I said, his presentation in Old Age was God tier, better than any old legend besides Whitebeard.
But then in the flash back he was portrayed as just another first mate. I guess its understandable, Oda had a lot of shit going on atm, and flash back was about Oden, he should have given a person the caliber of Rayleigh, the appropriate treatment that a Yonko level+ guy would get.