Answer to: Repeated unjustified comments "your demonstration sucks" during a presentation

The n+3 made a fool of himself by repeatedly dismissing the work in front of the audience without giving any technical or professional reasoning. Before following up, clarify your goal: are you looking to convince others, get support, or just vent. If it’s the latter, it’s already clear that he was out of line. When comments aren’t accompanied by explanations, the most professional approach is to ask clarifying questions, document your responses, and focus on the evidence and results you can control, don’t let vague criticism derail your work. Sometimes the best move is to let it go and focus on your work.