Retrogression

[Sarah]

Backward development; a passing from a higher to a lower stateof organization or structure, as when an animal, approachingmaturity, becomes less highly organized than would be expected fromits earlier stages or known relationship. Called also retrogradedevelopment, and regressive metamorphism.

[Sarah]

Moving towards moving in reverse. Trending toward regressing.

[Mark Zuckerberg]

the act of returning to an older and worse state:

[PussyCat]

The process of returning to an earlier state, typically a worse one.