How did Martin Heidegger criticize Husserl’s search for a detached standpoint of knowledge?

Martin Heidegger criticized Edmund Husserl’s search for a detached standpoint of knowledge by rejecting the necessity of a transcendental ego and the phenomenological reduction. While Husserl sought to isolate the structures of consciousness by bracketing the world and history to achieve a pure, detached perspective, Heidegger argued that human existence is fundamentally characterized as "being-in-the-world".123

Heidegger contended that humans are always already "thrown" into a world of everyday cares, commitments, and projects. By defining the human individual as Dasein ("being there"), Heidegger moved away from the Cartesian model of a mind isolated from the world, which he believed Husserl’s approach still mirrored. Instead of seeking a detached, objective standpoint, Heidegger’s hermeneutic phenomenology focuses on interpreting the human situation as it is already understood. Consequently, he discarded the idea that specific mental states or a detached consciousness are required to mediate our relationship with the world, viewing such concepts as misdescriptions of human existence.4251