Judges 2:19
And it came to pass, when the judge was dead, that they returned, and corrupted themselves more than their fathers, in following other gods to serve them, and to bow down unto them; they ceased not from their own doings, nor from their stubborn way.
The verse belongs to the history of revival and decline among ancient Israel. It describes what happened after a judge died, when faithful leadership ended. Specifically after Othniel's death, the people again abandoned God's law and returned to idolatry.
In that return they corrupted themselves even more than their fathers, becoming worse than the generation before them. They kept following other gods to serve them and to bow down to them. They did not cease from their own doings and stubborn way, persisting in their own practices and stubborn course rather than turning back to God. This repeated the cycle of backsliding and chastisement followed by confession and deliverance.