Pronger didn't do anything worse than what Chelios had done in his career. As others have mentioned, he made the teams he was on better and carried a couple of them on his back to the Finals.
I'm surprised Holmgren said that. It's a pretty obvious thing but it's not like Pronger had announced retirement or anything. He'll never play hockey again but hopefully his symptoms improve so he lead a mostly normal life and enjoy spending time with his kids. Last I heard his symptoms sounded awful.
True, but Chelios evolved. Pronger stayed an SOB. Some people like that, I get it. I never appreciated him.