Hi Void . . . Hi

First of all I didn't ever refer to anything as a "legit public defender job" ... the word legit in parenthesis simply refers to a "legit public defender's office" as mentioned in the previous sentence.
What is a legit public defender's office? You've proposed it's a steaming pile of shit. Fascinating...
What I was trying to say is that more "legitimate" public defenders offices (i.e. those that actually provide stellar representation for their clients), also tend to pay their attorneys the most. Why? There's a variety of reasons - higher salary, better applicants, etc., etc. Use the steaming pile of shit you call your brains Void and figure it out.
My broader point was that the only PD offices that would even consider an application from someone like the OP would be in a state / county where indigents receive inadequate legal services and where, more often than not, the PD's are also paid less. (No offense meant to the OP - - but yeah, no passion for the career + terrible grades at a lower ranked school = good luck getting a job at a good PD office.)
At a well-funded PD office full of passionate people, low GPA resumes from low ranked schools found in applications expressing a lack of interest in public defense are going to be immediately thrown in the trash in the exact same manner the OP's application was likely thrown wayside at OCI for lack of low grades.
Public Defender's offices, at least the well-functioning, legitimate ones, are not bastions for people who just barely were able to smuggle themselves through one of the more questionable back doors into the legal profession. Peoples lives are at stake here - the last thing the indigent accused needed are incompetent, lazy attorneys who only agreed to represent them due to a lack of more desirable options.
JUST IN CASE THIS ISN'T CLEAR: Look at the payscales of the most elite PD offices . . . (n.b.: their eliteness again stems from the fact that they are seen to be legitimately carrying out their mission of providing indigent defendants with the highest quality legal aid). What you should note is that the best of the best (See: PDS, San Francisco, etc., etc.), also compensate the best. The correlation might not hold true 100% or even 75% of the time, but I think the point I'm making is more than the excrement fermenting in the imagination of Mr. Void.