Heidegger may indeed not have taken into account what the socalled 'postmodern' authors call the decenterment of the subject, which is also its splitting : the decentered subject turns around some 'thing' that keeps it circling around it, and yet does not let itself become accessed. I have used several examples in my publications of such a 'thing' which took the subject's place at the centre :e.g. all things that are 'meaningful' for us but therefore cannot have meaning, e.g. our values, our sex, our nation, our "race", our beliefsystems etc.