Retrogression (noun)

The process or action of moving backwards or returning to an earlier state or condition.

Origin:

From retro- (meaning "backwards") and progression (meaning "forward movement or developmen.t")

Examples:

1. The country's economy was in retrogression due to the policies of the previous government.
2. The company's retrogression in the market was caused by a lack of innovation.
3. The retrogression of the disease was unexpected, and the doctors were puzzled.
4. The retrogression in technology was a significant obstacle to the project's success.
5. The retrogression in the relationship was hard to watch, they used to be so close.