There are few common ways to describe moody teenagers, albeit not overly precise:
I'm wondering if there is anything more colorful to describe these cranky kids?
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多愁善感 is a common phrase for describing moody
Moody teenagers would be 多愁善感的少年 or simply 多愁少年
林黛玉 in 紅樓夢 is a classic example of 多愁善感的少女 (多愁少女)
憤青 short for 憤怒青年 (angry teenager)
抑鬱少年 (depress teenager)
情緒化 means 'emotional'
情緒化的少年 means 'emotional teenager'