death spiral
US /ˈdeθ ˌspaɪ.rəl/
UK /ˈdeθ ˌspaɪ.rəl/

1.
a situation in which a problem or bad situation gets worse and worse, causing other problems that make the original problem even worse
:
•
The company entered a death spiral after losing its major clients and failing to innovate.
•
Rising unemployment can lead to a death spiral in the economy.