In the spacex subreddit there are comments claiming that key engineers have left the company because of differences with leadership/culture. Not sure how credible those are, but spacex has had suspiciously many failures recently.
I think about the countless engineering success stories I’ve read where you can tell the people involved were just living and breathing the problem.
https://www.comparably.com/companies/spacex/culture/seattle
https://www.comparably.com/companies/spacex/enps
U.S. tech companies are notorious for high turnover and SpaceX doesn't seem particularly bad.
Then again, they are launching tons of rockets, and any cult leader has his followers, so what do I know...
Especially with how hot the field is these days. I suspect "key" SpaceX engineers do not lack for lucrative offers.