What actually happened isn't relevant. What is relevant is whether he may have thought it would work better. Tricky to prove.
This is all publicly available. Due to leverage, he faced ruin if Tesla fell below X (whatever X is) if he funded it all himself. So he opened his side of the deal up to other people, and allowed other large shareholders to come inside his tent - which reduced his exposure. Then the market dropped 15%.
Matt Levine has an excellent series of newsletters covering it.
There's no way he didn't foresee this.
It would be shocking if he is lacking in self-awareness to that extent.
'Ol Musky missing self-awareness? Surely, you jest Mr. Spock!
Just remember the launch of Tesla auto-pilot, where he was promising full self driving within a year or two, so good that you would let your car work as a taxi while you don't need it and it would become a passive stream of income so great you would see your investment back in around a year! He actually said "our goal is to make Ilit financially irresponsible to buy any other car". This is not a man who "manages hype".