★★ (2 out of 4)
“A lot of people ask what I’ve been up to since high school. Honestly? Nothing good.” That little bit of voiceover from Zendaya kicks off the third and likely final season of “Euphoria,” the HBO Max series that has already won the star of “Challengers” and “The Drama” two Emmys. Awards glory is otherwise unlikely to shine on Season 3, which returns after a four-year absence in shocking disrepair. Two words spring to mind: what happened?