The 13 Reasons Why that people should be praising. Yes, the concept isn't original in any way, we've all seen it before, but is merely a tool of storytelling.
This turns out very quickly into a very interesting study about teen stereotypes and the horrors of high school, seem by the point of view of someone privileged and popular.
The lead character is someone who got it all - beautiful body; regular, rich and also happy family who loves her; popular friends and the most desired boy in school dating her. Yet, everything comes easy because she just let things happen. And a lot of bad things too.
So she enters into a downward spiral between all the people that she hurt because she had a passive attitude and was basically a coward.
In the end, the lesson that stays is: words hurt and we all should use them more carefully.