Things went catastrophically wrong. It was a real fiasco. We tried to {compensate|mitigate the situation, but it was like trying to stop a tsunami with a cocktail stick. We're still picking up the pieces and feeling the impact of this unmitigated catastrophe.
situation Beyond Repair
This problem has spiraled out of control. It's a total disaster. We've tried everything to fix it, but nothing seems to work. At this point, it feels like we're hopelessly stuck. Seriously. My {boss|mentor|was absolutely furious. I managed to explain, but it was a hopeless situation.
The rest of the day was an absolute nightmare. Everything. I get anything done.
By the time I reached my destination, I was completely drained. This day, this horrific day will be forever remembered as a day to forget.
Things Went From Bad to Absolutely Terrible
It all started out badly with a simple mishap/incident/screw-up. But then it went from bad to absolutely terrible. A series/chain/cascade of unfortunate/awful/disastrous events unfolded/occurred/piled on top website each other, leaving me feeling like I was in a nightmare/horror movie/comedy of errors. It's the kind of situation where you just want to scream into a pillow.