You're right, it's not a teen drama. Being on the CW makes it easy to forget that lol"Supergirl" isn't a Teen Drama though. The characters are young adults who out of college in the 1st season.
None of the chicks on "90210" were the female lead after the 1st season. The show was a true ensemble cast. And nobody gives a fucc about "Dixon & Ivy", quit cysing them as some type of great couple.