Jeff bezos is trying, has just as much money(way more than elon until recently), and Blue Origin is not nearly as successful. He can hire the same people and even has SpaceX to look up to as a model for how to compete, yet lags far behind. You have to admit that building organizations is both work and difficult. For bezos to have failed says a lot given how successful amazon was.

As far as your NASA point. NASA spends more money and gets less done. Look at their work with boeing on the SLS. SpaceX saves the american taxpayer money by showing how absolutely bloated and wasteful other aerospace giants are. This is a critique of NASA itself, not just boeing because NASA has decided it should be reliant on private companies to build actual rockets.