Apparently I have to specify this, but baseball is a small subsection of life and nobody deserves cancer ever, especially not over something as trivial as baseball. Is that clear enough? OK now that context which I would have assumed was obvious and implicit is out of the way:
Sandberg trying to position himself as an old-school baseball moralist by taking a dump on the guy who replaced him as the most popular Cub is absolutely ridiculous white boomer BS and he can horsefeathers all the way off.
Besides the fact that he was a fielding diva who cared more about his error stats than his team, he's a quitter. He quit on his team in 1994, which is supposed to be the cardinal clubhouse sin. Then he did it again as manager of the Phillies.
If you wanna be a quitter, be a quitter. Quitting is awesome and more people should do it when situations suck.
But when you make a habit of it, you don't get to position yourself as some champion of the clubhouse just to score some cheap white boomer points at your HOF speech or to try to get every random Jim and Joebob from south of Peoria to clamor for you to be the Cubs manager.