No, he didn't. Soros shorted the British Pound; he was also was assessed a fine for insider trading in France. Musk is exercising options, as part of his compensation package. But nice try.
I’m not saying that what Soros did was legal or ethical, but it seems to be the same economic mechanism as what Musk did. Sell lots to lower the costs of the shares and then use the money made to buy them back and more.