He warned everyone that if he kept on sabotaging the team and trying to sow dissent that it might be bad for the team, but they just wouldn't do everything his way.
It wasn't all solely his fault. Perhaps he gets more of the blame than he should due to being the one among the people involved most inclined to run his mouth in public. But it sure wasn't "nothing to do with him."
One person who believes that Jos Verstappen is somehow involved in the team operations is Jos Verstappen, as the headline indicates. He certainly has at least some small amount of influence with one person who does work for Red Bull. We only hear what he's willing to say in public, and it's more than enough to demonstrate that he enjoys getting involved.