In my opinion, Heidegger severely harmed thinking about Man.
He reduced Man to a mere structure, devoid of body and personal spirit.
In Heidegger, a man is a simple structure thrown into the world. But Man, first and foremost, is haecceitas.I mean, He, She. It’s I, you, he, she, we, you, they... In Heidegger, Man becomes IT. For this reason, Martin Heidegger’s philosophy is a significant distortion of the concept of Man.Probably, his Nazi vision influenced his thinking. In his view, Man is just a small brick in a vast wall. In Heidegger, there is uniquely a culture of Death, not of Life.
His philosophical vision of Man is a post-romantic vision of contempt for Life. There cannot be Life in Man without Man. In Heidegger, there is no Man, but a structure of Man that he calls Dasein.While romantic poets cherished the grave as a final rest from a life of disillusion and suffering, in Heidegger, the grave is the structure itself of humanity: Dasein.
Man, for Heidegger, is often merely a linguistic execution of linguistic games.