Riding in the same boat bro!
I tried to build & ship a simple tool [1] in one month(not 1 day btw), which got almost 0 customer engagement - just few comments on how good the idea is.
This made me question myself on solving a bigger problem & I spent around 5 months on a ML based product.Which eventually turned out out of my ML knowledge's reach (couldn't hire one too); so I stopped working on it & put it aside for sometime later.
Right now, like you, I'm working on building an audience on reddit/IH/twitter; so that I can ship my short-sprinted projects.