complacent

adj

1. Uncritically satisfied with oneself or one's achievements; smug.

   “He grew complacent as the years rolled on and the money rolled in.”

   “England will feel confident but not complacent against Ukraine, and the shock exit of France to Switzerland shows no-one can be taken lightly.”

2. Unduly unworried or apathetic with regard to a need or problem.

   “He tried to paint his audience as complacent, yelling that if they weren't mad as hell then they weren't paying enough attention.”