When actresses or models age and look older than they use to, the Japanese internet word for them is "deteriorated."
Your inferiority has changed. In fact, it's getting worse and worse, changing by the minute. Each minute that goes by is another minute where you're getting worse. This is deterioration.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.