It is not the moderators' jobs to decide on their own what is and is not proper content for SO. That is the job of the community.
Fortunately, that's not what happened here...
Someone flagged that post for moderator attention, and the response was to close it. Why was that the response? You said it yourself:
[...] is a crappy question, to be sure. It is long, ranty, and flame-fodder.
Flame-bait, rants, and unclear questions have not ever been considered "proper content" for SO. Go ahead, ask anyone, "Should SO host crappy, ranty, flame-fodder questions?", and I'll bet you 9 out of 10 responses will be "no" (with the rest being some form of, "Only when I'm awake to partake of the carnage").
There are a few simple ways for you to judge the community's support of the moderator's action:
Was the question re-opened after the moderator closed it? (No, in fact there's only one re-open vote... and currently two votes to delete)
Was the question edited by someone other than the original author to address the problems pointed out in comments? (No, no one has made any attempt to salvage this question)
Are there any comments calling for the question to be re-opened? (No, comments are universally negative regarding the value of the question)
So the question was closed in accordance with the community's wishes. Good work, Kev...