I can list half a dozen projects of mine that were ideas ahead of their time. I had novel ideas. I built prototypes/MVPs. I even paid the bills with some of them. But other people came along afterwards and did it bigger and better than I did.

And there is nothing wrong with that. I still make things. I pay my bills. And whether or not I have huge business success, I spend my time each evening with my wife and children in a home we love. I consider that a success no matter how uninspiring my career may be.

So don't look back. Your success in your work does not define whether you personally are a success or a loser. Look at the good of what you have now, not the ideal world that could have been if you had successfully min/maxed every possible decision in life.