I saw you commenting on one of my posts yesterday, and I checked out your projects. They look very good, and I can't really put my finger on the problem. Maybe you should put more emphasis on your projects on your resume? If I remember correctly you're in Canada and looking for a job in the US. It might just be the added overhead of finding a job in another country.
It's also a possibility to market your products more. If you have friends who would be good at this, they can help you. You have quite a fancy product, and I bet many people would love to start a journey to build something with you. Find someone with more experience in looking for investors and you might have something on your hands (and you wouldn't even need to do an interview).
I think the tech job market is a hard one because there are so many niches. That said, have you tried an interview training? It is hard for people to point out the problem via the internet. No offense, but maybe there is a simple thing you're doing wrong. I know I have a tendency to undersell myself, and I don't always share my excitement with others, which might come across as a lack of enthusiasm.
Last but not least: It can't hurt to study some academic subjects.
Anyway, I wish you the best of luck. Your projects look cool, and I don't understand why you're having a hard time finding a job.