Sandberg effectively forced the Cubs to trade Palmeiro, and then "quit on his team" to a nigh-infinitely greater degree than Sosa ever did. He's never had any issue with being a dick to players he doesn't think much of, both when he was a player and then when he was coaching (and with that laughably bad sports column he wrote for a hot second, too).
Grace also "bailed on the Cubs," if we're going by meatball logic, has repeated drunk driving busts, was smoking in the dugout like a stone cold dirtbag. The dude clearly has his demons, and it very clearly influenced how he behaved and treated other people throughout his career.
We also have no idea if either juiced or not.
And I'm not saying any of this with the idea that either should be shunned by the Cubs or need to apologize to anyone; all of these players should still have a relationship with the team because of what they mean to so many of the fans, and it would be very, very dumb to play into meatball nonsense and keeping any of them at arm's length.