What’s the most underrated factor that determines a startup’s success?

Startups often credit their success to factors like product-market fit, funding, or the founding team. But what about the less talked-about factors? For instance, I’ve noticed startups with exceptional customer service can gain loyal users even if their product isn’t perfect. What do you think is the most underrated element that makes or breaks a startup? Have you seen a surprising factor play a key role in success or failure? I'm currently involved in a start-up and we launched just a few weeks ago. A lot of money has been poured into this start-up and we have great products, but it has all felt a bit underwhelming with the audience response - even with a lot of budget behind us...