I mean, most Tesla engineering hires are thankfully smarter than their management - not that they don't have some great competition out there though (Merc, Porsche, etc.)
His management style may not be agreeable to people and he gets criticized for that a lot obviously. But the technical vision that he drives at Tesla, SpaceX, and his other companies are undeniable what makes these companies so valuable.
And it's exactly where his competitor's performance is less than stellar. Particularly at the companies you mention.