retrogress

To return to an earlier, inferior, or less complex condition.

To go or move backward.

Retrogradation; falling off; decline.

To move backward; retrograde.

Retrogression.

To return to an earlier, simpler or worse condition; to regress.

To go backwards; to retreat.

To return to bad behaviour; to relapse.

get worse or fall back to a previous condition

go back to bad behavior