I don't see an issue with what was presented. The person asked for a critique. It's obviously a poem, and not a short story. Why does a piece have to have nothing but raw sex involved for it to be about anything worth reading is the real question.
I look at it like this, if you're not dissecting a piece, and giving examples of how to better it, then why burden yourself and the writer with nonsense? For what, to be heard, to feel like your words have weight. This is solely speculation.
The piece is fine as, keep writing, and explore. Take care.
Nobody said it would benefit from more raw sex.
You are assuming too much regarding what was provided in each critique.
Sometimes critique is just providing an honest reaction like, "I had no desire to read it more than once." Doesn't mean it was a bad poem. I've watched plenty of decent movies only once.
And public critique can benefit three parties : the writer, the critiquer and an audience full of writers trying to evolve their craft. It's going out of one's way to help others, provided those others choose to help themselves to one's advice.