It really doesn't effectively communicate an idea, though--instead of "teen angst" meaning "anxiety as a result of social awkwardness as a result of being a teenager," it communicates some vague notion of "teen whining," and everyone has a different idea of what exactly constitutes angst.
To person A, "angst" is any expression that you have problems at all. To person B, angst is only angst if you express that you have problems in a fashion that they deem whiny. And to person C, this post is angsty, because since the internet does not necessarily communicate emotions well, the default assumption is that any post with the slightest grain of seriousness to it is ruining the internet with whining. <p>
<div style="text-align:center">

</div>
</p>