Founders often stumble over subtle “anti-signals” that spook VCs more effectively than outright mistakes. Pitching onstage for a small prize, for example, raises questions about your deal flow and network. A deck that looks too slick can read as desperation. Being endlessly available or slow to respond sends the wrong message about your priorities and competence. Other red flags focus on product instincts and fundraising habits. VCs hate poor design sense in consumer startups—taste matters as much as tech. If your emails are riddled with AI giveaways, they’ll wonder what else you’ve farmed out. Not knowing core metrics—TAM, CAC, retention, burn rate—is a straightforward deal-breaker. Claiming zero competition makes you seem naive. And running with only two months of runway looks like bad planning. Energy and timing also come into play. Founders with low enthusiasm undercut their pitch—early investors back people as much as ideas. “Always fundraising” suggests you’re not building. Waiting until you have only weeks left signals panic. The key takeaway? Learn these unspoken rules so you can decide when to play along and when to push back.