So your original claim, even if it was true could not be used to support that the 52 threads contained information which anyone trained to handle classified information should have recognized and raised concerns about its inappropriate appearance in non secured emails.
The server might make "mishandling classified information" worst. The server might be identified as a tool that was used for the express purpose of thwarting freedom of information requests. There have been a few other absurdities expressed such as the server being used as a repository of classified information that Hillary instructed to be copied from their appropriate places.
For Comey it was established to his satisfaction that using non secured email was "extremely careless" because the information in question should not have been communicated on unclassified systems. And that it was "especially concerning" being on a private server without full time security (IS) staff.
But even accepting Comey's conclusion doesn't establish that Hillary did anything inappropriate receiving and responding to these emails - assuming she didn't author them. It doesn't establish any recklessness beyond the generic one that she should have expected some classified information would from time to time inappropriately slip into such conversations.
Finally I don't think that there being a long list of accusations against Hillary is evidence that the emails were so egregious that anyone trained to handle classified information "should have known". Nor should one's opinion of Hillary in general mean that there should be a "presumption of guilt".
So given the choice of interpreting the lack of repercussions against anyone except Hillary and her inner circle for the exchange of the 110 emails as
- there was nothing really worthy of repercussions - especially four to eight years after the fact
- there is an effort among the executive branch to protect Hillary and no one cares to stand up to it
I'll take stick with the default explanation that should always exist for anyone until there is evidence to the contrary.