I don't think we all get a full picture of what happened - especially, in this case. Back in the day, I sold, set up, and configured email servers for many companies. I can tell you that none of the chief executives had any clue about the specifics of the implementation. As Secretary of State, Clinton was the head of an organization with 70,000 employees in practically every country in the world. You can't run an organization of that size without having to trust and delegate. It just can't be done. So, I think it is entirely possible that she trusted that the server was put in place legally and that someone who worked for her, when it was discovered that it was possibly not tried to cover their own tracks. In that case, she may be guilty of trusting the wrong technical person, but trying to make that distinction to the public is futile. People see what they want to see. It was investigated, they likely came to the same conclusion.
