Since when is it discouraged to point out minor criticism in a post?

Again, I wasn't speaking for all of Less Wrong. You'd have to ask the others why they downvoted you, but having committed the major faux pax of complaining about being downvoted, I don't think they'll be as receptive at this point.

I discourage anything that relates to pedantry, downvote whenever somebody is making a point, not because the point needs to be heard, but because they need to be heard. There's some subjectivity to it, of course. But it boils down to "Do I find that this comment adds, or detracts, from the meaningful conversation that can be had?" And I found yours to detract more than it added, for reasons already specified.

There's also more than a slight smell of identity politics to the way you're approaching this, particularly in the way you immediately threw yourself into the "Victim" role as soon as you perceived you weren't being treated with the gravity you expected. That might be an avenue for you to consider. Identity politics don't go over well here.