People have their issues with Axelrod (myself included), but he's right here.... there aren't going to be public calls for him to step down. Maybe there's a few party elders (ie. Schumer, Jeffries, Pelosi, Clyburn) *behind close doors* who can have the conversation with him, but ultimately it's a decision that he's going to have to make, in consultation with his family.
Expecting a jail break from rank and file or Dem surrogates (ie. Whitmer, Shapiro, Pritzker, etc.) is unrealistic. And there is no mechanism to force him off the ballot that doesn't involve him making that choice.
And in the unlikely event that it happens, it will be Kamala Harris. If you are advocating he step aside, be comfortable with that.