Thank you for your post. I am actually considering 2 options. I am afraid my supervisor just wants to fail me, he is actually doing things also with other students that I would prefer to have never seen a professor doing. First, changing department and defending only with my co-supervisor, by asking the univ to change my co-supervisor to supervisor. Second, changing university, as I have contacts with normal professors of the field in other countries. What is your opinion on that?