Do you want to be an engineering leader? This is what you are, regardless of your official title at your company. Engineering leaders are judged by how much better they make everyone else. You may hear the term force multiplier used. Say you are really a 10x engineer, how much more effective are you if you could improve the efficiency of 350 developers by 10%? Mentor, teach, help establish culture, make systemic changes to help your peers become more effective.
Regardless, I think you're a bad fit for your current company and its culture. And yes, many of us have worked in environments, like a startup, where we knew we were critical to success. Fail to deliver and a funding round wouldn't go through and people would lose their jobs. It's stressful, but I hope you're adequately compensated.