I’m not sure. Even with the way he’s flapping his gums, I think it serves a purpose for Putin.
It’s straight out of the authoritarian fascist dictator playbook for their government to be made up of dysfunctional bitterly opposed factions that are constantly jockeying and in a fight to the death amongst themselves for power, influence and the leader’s approval.
As long as Prigozhin continues to be useful, keeps his vitriol directed at rivals like Shoigu & Gerasimov and continues treating Tsar Putin himself as sacrosanct, he’s likely safe.