Changing company culture is incredibly hard in the best of places. In your case, it sounds impossible. Don't even try, it'll eat your soul. Instead, do the bes

Changing company culture is incredibly hard in the best of places. In your case, it sounds impossible. Don't even try, it'll eat your soul. Instead, do the best job your can, while accepting that you can't turn this company around. Be humble: don't tell others they're wrong all the time (even if they are). Be helpful. At the same time, look hard for another job.