He's been arguing for a long time that the HOF is not what it used to be in terms of the criteria used for admission. This is what he said back in 2020:
""Once upon a time, a Hall of Famer was a player who changed the darn game, who made you want to reach in your pocket and pay your admission to see that guy play," Sanders said. "That’s not a Hall of Famer anymore. Every Tom, Dick and Harry, you’re a Hall of Famer, you’re a Hall of Famer, you’re a Hall of Famer. They let everybody in this thing. It’s not exclusive anymore. And I don’t like it.”
I think he has a point.