Supposedly she got the server set up because the NSA refused to give a politician who travels frequently a secure smartphone. She (I personally believe) was likely ignorant of many of the security requirements of such a server (even one set up for unclassified e-mail), as was whoever set it up. And no-one on her staff either knew enough or was willing enough to say anything. She is also supposedly not the first Secretary of State to have an arrangement of this nature.
This feels like the very definition of systematic failure and clearly needs to change. But the conversation is almost exclusively based around a) her having nefarious motivations, because she is Hillary Clinton, or b) this all being a Republican plot to derail the Democratic candidate for President.
It's all very depressing.