That simply distinguishes every successful business ever (with a few lucky exceptions) from the ones that failed because their owners gave up too early.
Two years is about a minimum that you should be prepared to dedicate to your newborn business if you are at all serious about it.
I've written a bit about this here:
https://jacquesmattheij.com/it-takes-three-years-to-build-a-...
How do you know when to give up though? I've developed a great product, spent 4 years working on it and still only make enough to cover hosting bills. I'm toying with the idea of Throwing in the towel, but I'm plagued with "what ifs".
Hopefully we can tell more stories to show that two years really should be your minimum commitment to just get traction.
Best of luck!