Complacent (adjective)
Uncritically satisfied with oneself or one’s achievements; smug.
Complacent (adjective)
Apathetic with regard to an apparent need or problem.
Uncomplacent (adjective)
Not complacent.
Wiktionary
Complacent (adjective)
showing smug or uncritical satisfaction with oneself or one’s achievements
“you can’t afford to be complacent about security”
Oxford Dictionary