disaprovement 

same as disaproval but makes more sense

"I'm allergic to my parents disaprovement

disaprovement by iZuRoX May 13, 2010

Dimprovement 

Declared improvement that makes a task more difficult than before, when it was perfectly fine.

They keep working on the old interface until it became a real dimprovement. Now it requires scrolling on each input.

Dimprovement by floyd-humphrey September 28, 2011