Even before the poison pill was adopted, the evidence is the market wasn't taking Musk's offer seriously. That's because he was offering $54.20 per share (ha ha, 420), but the stock price never closed higher than $48.36. So almost $6/share was left on the table. Part of it is that Musk doesn't have $43B in cash, he'd have to raise it or borrow it. He's worth more than that but it isn't liquid; as an officer of Tesla…
Elon should really focus on his unfulfilled promises to folks he already took money from, not playing immature games to keep himself on the front page. I don't know what drugs he did with his ex-girlfriend, but they don't appear to have had a positive effect on his well being.