When has Elon said that the failures are the faults of his employees? Hell, he seldom claims that it's his success. Every Starship test flight he's congratulated the team for a job well done.
It's the random people constantly looking for excuses to not believe his successes ("he doesn'thave much to do with SpaceX" or "he stole Tesla"), as well as idiotic article headlines ("Elon Musk's SpaceX does X" etc) that have made up those ideas.