a red headed stepchild's rental mule - Something that gets the worst of everything, like it’s the p

Something that gets the worst of everything, like it’s the punchline of a bad joke.

My little brother’s report card was a red headed stepchild's rental mule. He got all Fs and a detention.

My stepmom’s new cat is a red headed stepchild's rental mule. It hissed at me and knocked over my cereal.

That broken bike was a red headed stepchild's rental mule. I fell off it three times and it still didn’t feel sorry for me.