Why are there so many bleak teen dramas on TV?

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A scene from the HBO show "Euphoria." Credit: HBO.

A new controversial HBO series called "Euphoria" premiered this weekend, and it follows a troubled high school student just out of rehab. Season two of “13 Reasons Why” aired last month -- after a controversial first season that made teen suicide a talking point. Season three of "Riverdale" just wrapped up with more gruesome murders for the high school students to solve.