So many people have been there. Working to put something together, but with gaps that are hard to close. I have been there.

Even billionaires like Zuck bite off more than they can chew and flail around.

For that matter, Jobs at NeXT succeeded in an unlikely way in the end. But for much of NeXT's existence it chronically couldn't get enough traction. They ended up droping the hardware. Then down purposed their OS into a developer platform to run on other OS's. So disappointing. But they did such good work, when Apple had a need, they were ready.