The feedback provided wasn't helpful. You're absolutely correct in that shallow dismissals aren't kind, but you're wrong about who was shallow and who was not. OP didn't dismiss anyone, nor was their comment shallow. And they don't owe you or anyone else anything as far as "explanation" goes, and they can filter out whoever the hell they want. Click the link and look further, or don't.

Meanwhile, dr_ketyn's comment was both rude and not constructive in the slightest (here's a tip: starting feedback with "I hate this" isn't constructive or kind).