After the world of Das Mann lose its significance and becomes meaningless, one falls in anxiety and he's able to embrace other possibilities.
But this anxiety is converted automatically into certain manifestations:
This anxiety cannot be located. As Rollo May says, "it attacks us from all sides at once." A fear that can neither be understood nor located cannot be confronted and becomes more terrible still: it begets a feeling of helplessness which invariably generates further anxiety. (Freud felt that anxiety was a reaction to helplessness; anxiety, he wrote, "is a signal which announces that there is danger" and the individual is "expecting a situation of helplessness to set in." How can we combat anxiety? By displacing it from nothing to something. This is what Kierkegaard meant by "the nothing which is the object of dread becomes, as it were, more and more a something."
(Existential psychotherapy, p43)
These manifestations can be phobias and obsessions:
Thus, neurotic symptoms serve to reduce and narrow—to magically transform the world so that he may be distracted from the concerns of death, guilt, and meaninglessness.
(Humanistic psychiatry: from oppression to choice, pp. 123)
(A) Unlike Nietzsche and his self-creation, does Heidegger want us to remain at anxiety and not choose to become anything even a self-created self?
So that if man came to terms with anxiety and its manifestations, he avoids the extra guilt of neurosis, but nevertheless still suffers from anxiety and its manifestations.
But what's the outcome to man from his suffering of anxiety?
(B) Or, does he want us to abandon anxiety and become ourselves instead of Das Mann, but if so, i can't find a difference between being ourselves or Das Mann: both of them seem inauthentic modes of being as they hinder of us of considering other possibilities of what we can be.