Phillip, Looking back to 2013-2014, I was wondering what would you have done differently both on the product and also for yourself?That's a good question. The most obvious thing would be to not push myself so hard, get more sleep, drink fewer energy drinks, exercise more, etc.
On the product side... Not sure right this minute, other than saying "narrow the focus and do less".
The one thing I thought about a lot back in those days, but ultimately decided against was trying to raise a FFF (Friends, Fools, Family) round of financing, hopefully enough to quit the day job and give myself at least a year of runway. Even now with the benefit of hindsight I'm not sure if that would have been worthwhile or not.