I just ran a query and want to be clear - until 3:05 UTC today, the question had a positive score of 5 with no down votes, no moderator flags, no close votes and had been marked as a favorite. The question is also well over a week old, has an up voted accepted answer and hasn't moved prior to today. Everything negative associated with that question happened after this discussion was posted.
Five people found the question to be useful, and someone understood it to the point of providing a subsequently up-voted and accepted answer. I even double checked to make sure nobody 'helped' that question through sock puppets or a voting ring. It was in fact, at least objectively, a good sampling for an audit. It's not a bug.
Regarding the question.
If you felt that the question should be closed due to not showing any code, that's up to you - our opinions differ. I tend to think that the question is easily understandable and most likely asked by someone who had no idea what to even search for in order to figure out the problem. I did not read the question as someone asking for others to do their work for them, I read it as a beginner that was terminally stuck, and I'm glad they got a good answer. Closing can sometimes be a subjective business - that's part of using the site.
Once in a while you're bound to find yourself at odds with actions that the community did or did not take as you use the site, that's not really anything new. The audit of course exacerbated your reaction to this, but it's just one audit - nothing bad is going to happen to you due to the action you felt was appropriate being at odds with what the system was expecting. While audits are generally very good at helping folks hone their moderation skills, they're primarily in place to catch people repeatedly not paying attention.
Even though we disagree on whether the question should remain open or not, you didn't really do anything wrong. What's left is perhaps for you to take another look at the question and see if you feel differently. If you don't - great - you earned your close votes and we're happy to see you use them.
But, I really don't think this is a failure of the audit selection criteria.