How I think it went down? When Hughes learned that Radnich and Krueger knew Joe was being let go- but never as much as said a nice goodbye-and kept that secret from Hughes? That was the end of Joe even wanting anything to do with KNBR let alone a last "Thank you".
Radnich and Kreuger both are look out for no.1 guys who have nobody's back but their own. Proved it once again.
Just a matter of time before they dump on the other. If that's needed?..it will be done. Loyalty is a joke to them.