California definitely has not lost Bezos, because he never lived in California. After school, he lived in NYC and then the suburbs of Seattle. I am sure he visited Silicon Valley often, but my guess was he visited NYC even more often. He has always been more linked to NYC than Silicon Valley.As I said, I can't make you understand why CA is losing major corporations and billionaires like Bezos and Musk. Perhaps you can call them and ask.
Musk, and the rest of the PayPal Mafia, are trying to leave Silicon Valley, but without Silicon Valley they are nothing. Musk's answer to this was to pledge to never own a house. He claims to rent a tiny house in Boca Chica, Texas as his primary residence, but does not appear to actually live there. The mothers of his children want to live in California, but he has been trying to set them up in Austin, Texas(the least Texas part of Texas). Some definitely still live in California, and he often spends a lot of time as a "guest" at houses in California.
A huge amount of Musk's businesses are still in California. That is where is valuable workers want to live, and that is where the companies are founded.