If you want to be Twitter CEO, you have failed the interview. Anyone who wants to sort out stinky toilets, unilaterally withdrawn contracts, regulatory fines, chary advertisers, and a massive trainwreck of interest payments coming up is clearly too thick to run a popsicle stand. You won't get paid enough. Elon will regard asking for a big severance package as an insult.
The best way to become Twitter CEO is to do that after the banks take possession, since the valuation is less than what's owed in LBO loans.