pain in the demise
When your demise is so bad it feels like your grandma kicked you in the nuts and then left you to die in a ditch
My math test was pain in the demise. I failed, my dog died, and my mom yelled at me.
That breakup was pain in the demise. He took my phone, my heart, and my last slice of pizza.
I got fired today. That was pain in the demise. My boss said I was a disaster, which I am.