Jeremiah describes the course that the people have taken as evil and their might is not right.
In the context of the whole section, Jeremiah probably has mainly the prophets in mind here. They have abused their position of power to lead the people into evil ways instead of into faithfulness to the Lord.1
10 Car le pays est rempli d'adultères; Le pays est en deuil à cause de la malédiction; Les plaines du désert sont desséchées. Ils courent au mal, Ils n'ont de la force que pour l'iniquité.