Daniel D'Addario Chief TV CriticNetflix has lately been met with varying degrees of success with pure genre serial storytelling — shows that dig deep into surreality and find within it some level of heart. These are shows less like “Stranger Things,” which is built to have a broad, near-universally-understandable appeal, than like “The Umbrella Academy,” unapologetically niche.Within this realm, “Sweet Tooth” is a relatively successful outing.