The heavy debt load was caused by his purchase… He paid $26 bn, a couple other investors (including a Saudi prince) together paid $5 bn, the remaining $13 bn is a loan Twitter took out to buy itself on Musk’s behalf.
The purchase was always a financial death sentence. Either Twitter steps into line and becomes the propaganda tool he and his old friend Peter Thiel want, then it can have some extra investment, or Twitter dies.