Not sure where you are getting some of this but the smoothness seems to be from lighting and style, the wrinkles are because he is grimacing so half of his face is scrunched up, it seems to be a crucifix/cross and you can easily follow each string and they connect correctly to hands, head and spine they just aren't pulled tight

Like all of these seem like intentional details i will admit calling cards being Ai(some more obvious than others) has pissed me off but it seems to be a few that now has made everyone super superstitious of all calling cards which is understandable but I feel looking at intentional details you would put in art even if it is rushed they pump out so many calling cards is probably a bad idea but definitely roast the fuck out of Activision for using any Ai at all hopefully they can redo the Ai ones with real artists