In my experience, MIT chemical engineering faculty want their students to fail. I earned my PhD from this department (or should I say, in spite of this department). I believe some of them view their students as a potential future threat to them and try to force them out of research and academia. This includes, in my experience, ignoring requests for well-deserved reference letters and even publishing their student's work in their own paper without giving appropriate credit to the student (and I have documented proof of this). Students seem happier and more successful generally at other universities.