trainwreck waiting to happen

Translations
катастрофа, которая вот-вот произойдет
The project was a trainwreck waiting to happen due to poor planning.
Проект был катастрофой, которая вот-вот произойдет, из-за плохого планирования.
Definitions
A situation or event that is very likely to end in disaster, chaos, or failure, even though the problems have not yet occurred. It suggests that the negative outcome seems inevitable based on current circumstances.