This is something that I often wrestle with. I comfort myself by remembering that this has been the case for a long time though - remember Steve Jobs saying that Dropbox is a feature, not a product?

Another example: Slack logically should stand no chance against Facebook for Work, Microsoft Teams etc, but they're doing fine thanks to a laser sharp focus on enterprise communications, whereas FB and MS just can't do it as well, even with much larger resources.

If you flip your thinking, you can instead be inspired by the fact that you DON'T need 1000s of developers developing millions of features to create a good product, in fact, it's easier if you don't have that baggage, or an already ingrained culture and business model that may fight against any new direction.

Also, if the worse that happens is that Facebook validates your idea by copying it, you've probably done OK: https://en.wikipedia.org/wiki/Snap_Inc.#2017_Initial_Public_...