downslide
/ˈdaʊnˌslaɪd/
noun
- A gradual or steady decline or decrease, especially in value, quality, or performance.
- The team's downslide in the second half of the season cost them a playoff spot.
- There has been a downslide in customer satisfaction since the new policy was introduced.
- The stock market experienced a downslide after the disappointing earnings report.