Trevor,
That's a bit rough on Heidegger. You read him through Adorno. You do not read Heidegger's texts.

He explicitly rejected the existentialist reading you attribute to him.

Nothign on instrumental reason as a technological enframing.

Nothign about Heidegger's texts on poetics or art.

Nothing about undermining the dualities in western philosophy.

Nothing about philosophy as interpretation---what he has in common with Adorno.