Every job I have been at seems to have a small group of conscientious, dedicated people and a group of those that are only there to get by (or get ahead) and collect a paycheck. I think you can't worry too much about others doing a poor job - they have their own problems and story. Focus on making your work reflect who you are. My previous job was chaotic and I stressed out about all the problems. I finally had to change my mindset to focus on making my work the best it could be and stop letting the surrounding chaos frustrate me. It helped with the anxiety. I did finally leave that job about a year ago and like my new job much better.