People who don't appreciate teenagers just aren't allowing themselves to remember being young. And that's a shame.
Even when my now twenty- year- old was a teenager, and things came up, I always tried to look at it from his point of view. I always reminded myself that he was more than just my son. He was an individual person separate from me. And I think that's the key. Grownups should spend time listening to the music and the lyrics that teens like, with their teens and watch shows together and allow the teens, when they want to, to talk about what they are seeing and listening to and avoid taking it personal when they don't want to. Adults just need to remind themselves that even when they are sitting in front of their own teenager, they are looking at a real, individual person, someone who is evolving into so much more than just their little Johnny or Susie. When parents do that, they will actually find themselves in awe of these people their children are becoming. It was an amazing experience for me and I wish it hadn't ended so soon! Not that I miss the arguments, mind you, or the "outbursts" that occasionally came up. Despite the occasional "drama", I derived great pleasure in watching him grow and change, and hearing his perspective on things. And I found I agreed with him on many. Music as art, for example. Even his music, the sound of which made ME want to cringe, we were able, together, to appreciate as art, the same as my music was art, even though he'd rather have his fingernails pulled out one by one (his analogy, which made me laugh) than be forced to listen to it for even five minutes.
Adults need to just take a deep breath and step back and look at teens' evolution a little more objectively. That's my opinion. Having raised one and watched him evolve into a thinking, feeling, complex, thoughtful and kind individual, I think teenagers are awesome!
I hope this is helpfu to you.