The best you can do is find a correlated stock (Tesla) and short that instead. I think if Twitter goes bankrupt, you can expect Tesla to enter free-fall.
Tesla's current share price is extremely inflated - the market has priced in Elon Musk's genius magic. If this genius magic turns out to be a total fraud, Tesla stock price should go down to levels reflecting the stock price of a similarly sized/revenue producing car company.
To give you an idea:
Tesla revenue: 74.86B
Toyota revenue: 260.13B
Tesla market cap: 498.56B
Toyota market cap: 234.96B
That's roughly a 7.4x difference in expectation vs. reality.
I would hazard that some of that expectation is due to Tesla's potential for growth due to expected growth of the EV market.
I also think that a lot of anti-Musk sentiment has already been priced in. While a Twitter bankruptcy would absolutely have some further impact on that sentiment, it doesn't seem immediately obvious that it would wipeout all of Musk's fanatical support.
Given that, an immediate drop to 13% of Tesla's current value seems like a significant overestimate if Tesla keeps hitting sales and production targets. If Twitter bankruptcy accompanies a significant reduction in Tesla sales, I could see a drop of that size or larger, but not from a Twitter bankruptcy alone.
If not for Musks genius magic, why do you think Tesla deserves to be priced 7x higher than Toyota? I can see an argument for 2x maybe? But 7x is a massive difference considering Toyota is a not a company run by frauds, it is a serious company with ability to pivot into EV market in due time.