Luca Guadagnino is renowned for luscious, sensory filmmaking which bestowed him cinematic auteur status almost immediately. Most recently, he made viewers feel like all their bones were about to shatter in the hypnotic “Suspiria” and eroticized stone fruit in “Call Me by Your Name.” The prospect of his debut collaboration with HBO excited scores of fans eager to see Guadagnino’s immersive skills stretched out into an hours-long story. Unfortunately, that story—“We Are Who We Are,” a series Guadagnino co-wrote with Paolo Giordano and Francesca Manieri—is mostly devoid of the artistic filmmaker’s passionate, sensuous sensibilities and instead bloated with pretension and solemnity.