If you're joining an established team you should consider yourself a cultural anthropologist, and seek to understand the human-related aspects of why things are

If you're joining an established team you should consider yourself a cultural anthropologist, and seek to understand the human-related aspects of why things are the way you observe. You have not yet earned the legitimacy to have your big, disruptive changes considered, and once you do understand how we got where we are you'll have likely modified & tempered your original positions.